阅读说明：本技术 一种机电悬架多模式控制装置 (Multi-mode control device for electromechanical suspension ) 是由 宋慧新 金昊龙 肖洁 于 2021-07-23 设计创作，主要内容包括：本发明公开了一种机电悬架多模式控制装置,属于车辆悬架控制技术领域。装置包括高压电源、电机驱动器、三相整流桥、负载电阻与开关模块、悬架控制器、稳压升压模块和蓄电池,电机驱动器与高压电源连接,电机驱动器采集悬架电机的位置信号并接收悬架控制器的主动控制信号；负载电阻与开关模块内部包括多个负载控制开关、负载电阻、手动开关、被动悬架配置电阻和能量回收控制开关；负载控制开关和能量回收控制开关的各控制端与悬架控制器连接；负载电阻与开关模块的电源负极与能量回收控制开关的输出和稳压升压模块连接。本发明能够实现机电悬架四种工作模式瞬态切换,根据路况对车体提供最佳的隔振效果,有利于行驶平顺性的提升。(The invention discloses an electromechanical suspension multi-mode control device, and belongs to the technical field of vehicle suspension control. The device comprises a high-voltage power supply, a motor driver, a three-phase rectifier bridge, a load resistor and switch module, a suspension controller, a voltage stabilizing and boosting module and a storage battery, wherein the motor driver is connected with the high-voltage power supply and collects a position signal of a suspension motor and receives an active control signal of the suspension controller; the load resistor and switch module comprises a plurality of load control switches, a load resistor, a manual switch, a passive suspension configuration resistor and an energy recovery control switch; the control ends of the load control switch and the energy recovery control switch are connected with the suspension controller; and the load resistor and the power supply cathode of the switch module are connected with the output of the energy recovery control switch and the voltage stabilization boosting module. The invention can realize the transient switching of four working modes of the electromechanical suspension, provides the best vibration isolation effect for the vehicle body according to road conditions and is beneficial to improving the driving smoothness.)

1. The device is characterized by comprising a high-voltage power supply, a motor driver, a three-phase rectifier bridge, a load resistor and switch module, a suspension controller, a voltage stabilizing and boosting module and a storage battery;

the motor driver is connected with the positive electrode and the negative electrode of the high-voltage power supply, and collects position signals of a suspension motor and receives active control signals from a suspension controller; the motor driver functions in an active mode, and is in a closed state in other modes;

the three-phase rectifier bridge is connected with a three-phase cable of the suspension motor, so that three-phase alternating current generated by the suspension motor is converted into direct current after passing through the three-phase rectifier bridge;

the load resistor and switch module comprises more than one load control switch and load resistor, and also comprises a manual switch, a passive suspension configuration resistor and an energy recovery control switch, wherein the load control switch is connected with the corresponding load resistor in series and then is connected between the three-phase rectifier bridge and the voltage-stabilizing and boosting module in parallel, and the manual switch and the passive suspension configuration resistor are connected in series and then are connected between the three-phase rectifier bridge and the voltage-stabilizing and boosting module in parallel; the control ends of the load control switch and the energy recovery control switch are connected with the suspension controller; the load resistor and the power supply cathode of the switch module are correspondingly connected with the output of the energy recovery control switch and the voltage stabilizing and boosting module, and the voltage stabilizing and boosting module is correspondingly connected with the storage battery;

at any moment, the suspension controller determines the working states of the motor driver, the load resistor and switch module and the voltage stabilizing and boosting module, so that four working modes of active, semi-active energy consumption, semi-active energy recovery and passive of the electromechanical suspension machine are switched.

2. The electromechanical suspension multi-mode control device according to claim 1, wherein the load control switches inside the load resistor and switch module are D1, D2, D3.. Dn, and the load resistors are R1, R2, R3.. Rn.

3. An electromechanical suspension multimode control device according to claim 1 or 2, characterized in that the load resistance and switch module internal manual switch is Km, passive suspension configuration resistance is Rm and energy recovery control switch is Ke.

4. The electromechanical suspension multi-mode control device according to claim 3, wherein said motor driver has a motor control module and high voltage thyristor switches K1-K6 inside.

5. The electromechanical suspension multi-mode control device according to claim 4, wherein in the active mode, the suspension controller controls the motor driver to make the suspension motor do work, the motor driver receives an active control signal of the suspension controller, collects a motor rotor position signal, controls the high-voltage thyristor switch K1-K6 to be turned on and off according to a certain rule, and turns on or off a A, B, C three-phase winding of the motor to make the motor do work, so that the suspension generates active force to suppress vehicle body vibration; at this time, the load switches D1-Dn are turned off, the manual switch Km is turned off, and the energy recovery switch Ke is turned off.

6. The electromechanical suspension multi-mode control device according to claim 5, wherein in the semi-active energy dissipation control mode, the thyristor switches K1-K6, the manual switch Km and the energy recovery switch Ke are all in an off state;

the suspension controller controls the load control switch to realize the control of the suspension damping, and when the D1, the D2, the D3 and the. When the D1, the D2, the D3, the.

7. The electromechanical suspension multi-mode control device according to claim 6, characterized in that in said semi-active energy recovery control mode, said thyristor switches K1-K6 and manual switch Km are both in an off state; the energy recovery switch Ke and the load switches D1-Dn are opened or closed under the control of the suspension controller; the suspension controller can adjust the energy recovery amount by adjusting the on-off of the switch Ke and controlling the on-off of the load switch D1-Dn in a matching manner, and meanwhile, the purpose of controlling the damping of the suspension is achieved.

8. The electromechanical suspension multi-mode control device according to claim 7, characterized in that in the passive mode, the manual switch Km is turned on, the manual resistor Rm is turned on, the high-voltage thyristors K1-K6 are all turned off, the load switches D1-Dn are all turned off, and the energy recovery switch Ke is turned off; at this time, the load resistance is not adjustable, and the suspension works in a passive mode.

Technical Field

The invention belongs to the technical field of vehicle suspension control, and particularly relates to an electromechanical suspension multi-mode switching control device.

Background

The electromechanical suspension is a novel suspension, and one of the core technologies of the electromechanical suspension is that a damping element of the traditional suspension is replaced by a motor, so that real-time and quick adjustment of damping parameters of the suspension is realized, and control force can be actively output, so that the performance of a moving system of a vehicle is optimal.

As shown in fig. 1, the electromechanical suspension generally supports the static weight of the vehicle body by an elastic element (such as a coil spring, a torsion bar, a leaf spring, etc.), and generates an active force, or damping force, by an actuator (composed of a mechanical component and a motor). The electromechanical suspension can realize the conversion of electric energy into mechanical energy and realize the active adjustment of the suspension, thereby improving the smoothness and the operation stability of the vehicle; on the other hand, the mechanical energy of the suspension can be converted into electric energy, recovered and stored in the form of energy or dissipated.

The electromechanical suspension is an important development direction of the vehicle suspension technology and accords with the development trend of the full electrification of the vehicle. Electromechanical suspension utilizes the electromagnetic induction law, through the extension of suspension and tensile cutting magnetic induction line production induced electromotive force, can store and the electric energy of recycling with the vibration energy conversion of suspension, reaches the damping performance simultaneously. The electromechanical suspension is applied to a new energy automobile, has unique advantages, and has great advantages in the aspects of energy recovery efficiency, response characteristics and the like compared with other suspensions; secondly, compared with the traditional automobile, the new energy automobile is characterized in that a set of high-voltage battery-motor system is added, on one hand, the energy recovery system is similar to a regenerative braking energy recovery system, recovered electric energy is stored in a vehicle-mounted battery, and meanwhile, the energy recovery system and a vehicle-mounted driving motor can share one set of energy supply system without adding an additional energy storage and supply device; on the other hand, the energy feedback motor is designed into a high-voltage motor, so that the current of energy recovery can be effectively reduced, and the energy loss is reduced; and finally, the new energy automobile has stronger demand on electric energy, and can fully benefit the energy recovered by the electromechanical suspension, thereby improving the fuel economy and prolonging the driving range.

Disclosure of Invention

In view of this, the invention provides a multi-mode control device for an electromechanical suspension, which can realize transient switching of four working modes, namely active working mode, semi-active energy consumption working mode, semi-active energy recovery working mode and passive working mode, provide an optimal vibration isolation effect for a vehicle body according to road conditions, and is beneficial to improvement of driving smoothness and driving safety.

A multi-mode control device for an electromechanical suspension comprises a high-voltage power supply, a motor driver, a three-phase rectifier bridge, a load resistor and switch module, a suspension controller, a voltage-stabilizing and boosting module and a storage battery;

the motor driver is connected with the positive electrode and the negative electrode of the high-voltage power supply, and collects position signals of a suspension motor and receives active control signals from a suspension controller; the motor driver functions in an active mode, and is in a closed state in other modes;

the three-phase rectifier bridge is connected with a three-phase cable of the suspension motor, so that three-phase alternating current generated by the suspension motor is converted into direct current after passing through the three-phase rectifier bridge;

the load resistor and switch module comprises more than one load control switch and load resistor, and also comprises a manual switch, a passive suspension configuration resistor and an energy recovery control switch, wherein the load control switch is connected with the corresponding load resistor in series and then is connected between the three-phase rectifier bridge and the voltage-stabilizing and boosting module in parallel, and the manual switch and the passive suspension configuration resistor are connected in series and then are connected between the three-phase rectifier bridge and the voltage-stabilizing and boosting module in parallel; the control ends of the load control switch and the energy recovery control switch are connected with the suspension controller; the load resistor and the power supply cathode of the switch module are correspondingly connected with the output of the energy recovery control switch and the voltage stabilizing and boosting module, and the voltage stabilizing and boosting module is correspondingly connected with the storage battery;

at any moment, the suspension controller determines the working states of the motor driver, the load resistor and switch module and the voltage stabilizing and boosting module, so that four working modes of active, semi-active energy consumption, semi-active energy recovery and passive of the electromechanical suspension machine are switched.

Further, load control switches inside the load resistor and switch module are D1, D2, D3,. Dn, and load resistors are R1, R2, R3,. Rn.

Furthermore, the load resistor and a manual switch inside the switch module are Km, the passive suspension configuration resistor is Rm, and the energy recovery control switch is Ke.

Furthermore, a motor control module and a high-voltage silicon controlled switch K1-K6 are arranged in the motor driver.

Further, in the active mode, the suspension controller controls the motor driver to enable the suspension motor to work, the motor driver receives an active control signal of the suspension controller, collects a motor rotor position signal, controls the high-voltage silicon controlled switch K1-K6 to be turned on and off according to a certain rule, and turns on or off a A, B, C three-phase winding of the motor to enable the motor to work, so that the suspension generates active force and inhibits vehicle body vibration; at this time, the load switches D1-Dn are turned off, the manual switch Km is turned off, and the energy recovery switch Ke is turned off.

Further, in the semi-active energy consumption control mode, the silicon controlled switches K1-K6, the manual switch Km and the energy recovery switch Ke are all in an off state;

the suspension controller controls the load control switches to control the damping of the suspension, and when the load control switches D1, D2, D3 and. When the load control switches D1, D2, D3,. Dn are simultaneously turned off, the parallel resistance of the load resistors is the largest, which is equivalent to open circuit, but the suspension damping is the smallest.

Further, in a semi-active energy recovery control mode, the silicon controlled switches K1-K6 and the manual switch Km are both in an off state; the energy recovery switch Ke and the load switches D1-Dn are opened or closed under the control of the suspension controller; the suspension controller can adjust the energy recovery amount by adjusting the on-off of the switch Ke and controlling the on-off of the load switch D1-Dn in a matching manner, and meanwhile, the purpose of controlling the damping of the suspension is achieved.

Further, in the passive mode, a manual switch Km is turned on, a manual resistor Rm is switched on, high-voltage silicon controlled switches K1-K6 are all turned off, load switches D1-Dn are all turned off, and an energy recovery switch Ke is turned off; at this time, the load resistance is not adjustable, and the suspension works in a passive mode.

Has the advantages that:

1. the invention can realize the quick and reliable switching of the motor in a generator mode and a motor mode, complete the quick switching of the energy input and output of the suspension motor and realize the mode switching and energy management of the electromechanical suspension. Meanwhile, the function of manually switching to the passive mode is reserved, the electromechanical suspension can guarantee basic functions after the control system fails, and the method has the characteristics of simple hardware structure, high switching speed and high reliability.

2. The suspension controller can realize the control of the suspension damping by controlling the load control switch, and when the load control switch is switched on simultaneously, the parallel resistance value of the load resistor is minimum, but the suspension damping is maximum; when the load control switches are simultaneously turned off, the parallel resistance of the load resistor is the largest, namely, the load resistor is opened, but the suspension damping is the smallest. Therefore, the suspension controller can obtain different suspension damping values through different combinations.

Drawings

FIG. 1 is a schematic diagram of the operation of an electromechanical suspension;

fig. 2 is a schematic diagram of the electromechanical suspension multi-mode control device of the present invention.

Detailed Description

The invention is described in detail below by way of example with reference to the accompanying drawings.

As shown in fig. 2, the invention provides an electromechanical suspension multi-mode control device, which comprises a high-voltage power supply, an electric driver, a three-phase rectifier bridge, a load resistor and switch module, a suspension controller, a voltage stabilizing and boosting module, a storage battery and the like. The English letters in the components in the drawings have the following meanings: the system comprises a high-voltage power supply (an anode Ud and a cathode Ug), a suspension motor (a three-phase A, B, C and a magnet N, S pole), a three-phase rectifier bridge (comprising terminals ua, ub and uc), load resistors and switch modules (load control switches D1, D2, D3, a.. Dn, load resistors R1, R2, R3, a.. Rn, a manual switch Km and an energy recovery control switch Ke), and a suspension controller (a control end Cr1, Cr2, Cr3, a.. Crn energy recovery control end Ce).

The motor driver is connected with the positive electrode and the negative electrode of the high-voltage power supply, and a motor control module and a high-voltage silicon controlled switch K1-K6 are arranged in the motor driver. The motor driver collects position signals of the motor and receives active control signals from the suspension controller.

The motor drive is active in the active mode and is off in the remaining modes. Under the control of the control system, a high-voltage power supply is connected with an A, B, C three-phase winding of the suspension motor through a high-voltage silicon controlled switch according to a certain control rule, so that a motor rotor rotates to apply work.

The three-phase rectifier bridge is connected with a three-phase cable of the suspension motor, so that three-phase alternating current generated by the motor is converted into direct current after passing through the three-phase rectifier bridge, and the positive pole up and the negative pole ug of the direct current are correspondingly connected with the load resistor and the switch module.

The load resistor and switch module internally comprises load control switches D1, D2, D3,. Dn and load resistors R1, R2 and R3,. Rn; the value of n is taken according to the actual implementation, and if only 1 load resistor is configured, n is 1; if 3 load resistors are configured, n is 3. Meanwhile, the system comprises a manual switch Km and a passive suspension configuration resistor Rm; and also includes an energy recovery control switch Ke.

Each control terminal Cr1, Cr2, Cr3,. Crn of the load control switches D1, D2, D3,. Dn is connected to the suspension controller. The control end Ce of the energy recovery control switch Ke is connected to the suspension controller.

The load resistor is correspondingly connected with the power supply cathode ug of the switch module and the output of the switch Ke and the voltage stabilizing and boosting module, and the voltage stabilizing and boosting module is correspondingly connected with the storage battery.

The motor driver, the load resistor and switch module and the voltage stabilizing and boosting module are all controlled by a suspension controller. At any moment, the suspension controller determines the working states of the motor driver, the load generation resistor and switch module and the voltage stabilizing and boosting module.

(1) Active control mode

In the active mode, the suspension controller controls the motor driver to cause the suspension motor to do work. The motor driver receives an active control signal of the suspension controller, collects a motor rotor position signal and controls the high-voltage silicon controlled switch, the high-voltage silicon controlled switch K1-K6 is opened and closed according to a certain rule, and a A, B, C three-phase winding of the motor is switched on or off, so that the motor does work, the suspension generates active force, and the vibration of a vehicle body is restrained.

At this time, the load switches D1-Dn are turned off, the manual switch Km is turned off, and the energy recovery switch Ke is turned off.

(2) Semi-active energy consumption control mode

In the semi-active control mode, the electromechanical suspension motor is equivalent to a generator, at the moment, the silicon controlled switches K1-K6 are all in an off state, the manual switch Km is also in an off state, and the energy recovery switch Ke is turned off.

Under the excitation of road surface input, the motor rotor rotates to cut magnetic lines of force, and induction current is generated. Load switches D1, D2, D3.. Dn, etc. are turned on or off under the control strategy to configure the suspension with optimal damping.

Under the semi-active energy consumption mode, a three-phase rectifier bridge of a load circuit of the generator is utilized, and current generated by a three-phase coil of the motor is rectified and then is connected to a load resistor R1-Rn through a load switch D1-Dn. The control system monitors the motor coil currents ia, ib and ic, controls D1-Dn to match with the load resistance and controls the motor coil currents.

Load control switches D1, D2, D3,. Dn and load resistors R1, R2, R3,. Rn; the value of n is taken according to the actual implementation, and if only 1 load resistor is configured, n is 1; if 3 load resistors are configured, n is 3.

The suspension controller controls the load control switch to realize the control of the suspension damping, and when the D1, the D2, the D3 and the. When the D1, the D2, the D3, the. Therefore, the suspension controller can obtain different suspension damping values through different combinations.

(3) Semi-active energy recovery control mode

In a semi-active control mode, the electromechanical suspension motor is equivalent to a generator, at the moment, silicon controlled switches K1-K6 are all in an off state, and a manual switch Km is also in an off state; the energy recovery switch Ke and the load switches D1-Dn are opened or closed under the control of the suspension controller.

Under the excitation of road surface input, the motor rotor rotates to cut magnetic lines of force, induced current is generated, and the induced current passes through the rectifier bridge and is connected to the energy recovery switch Ke and the load switches D1-Dn. The energy recovery switch Ke is connected under the control of the suspension controller, current enters the voltage stabilizing and boosting module to realize voltage and current boosting and current stabilizing, and electric energy is stored in the energy storage battery.

At the moment, if the current in the motor coil generates damping which can meet the vibration reduction requirement of vehicle running, the load switch D1-Dn is in a disconnection state, and the system is in an energy recovery state at the moment; if the damping can not meet the requirement, the load switch D1-Dn is controlled by the suspension controller to match the load resistance, and the current in the motor coil is adjusted to enable the damping to meet the requirement. The system is in a superposition state of energy recovery and dissipation.

When the energy recovery switch Ke is turned off and the load switch D1-Dn is turned off, the motor idles, the motor does not generate electricity, and the damping is minimum.

The suspension controller can adjust the energy recovery amount by adjusting the on-off of the switch Ke and controlling the on-off of the load switch D1-Dn in a matching manner, and meanwhile, the purpose of controlling the damping of the suspension is achieved.

(4) Passive mode

When the control system fails, the manual switch Km is operated, and the electromechanical suspension can be converted into a passive suspension (passive mode) by using the fixed load resistor Rm, so that degraded use is realized.

The manual switch Km is active in the passive mode and is off in the remaining modes. In the passive mode, the manual switch Km is turned on to turn on the manual resistor Rm. The high-voltage silicon controlled switches K1-K6 are all closed, the load switches D1-Dn are all closed, and the energy recovery switch Ke is closed. At this time, the load resistance is not adjustable, and the suspension works in a passive mode.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.