阅读说明：本技术 控制装置、车辆系统及控制方法 (Control device, vehicle system, and control method ) 是由 田中雅树 于 2020-02-12 设计创作，主要内容包括：本发明提供既能抑制过大电流、又能提高电动机控制的效率的控制装置、车辆系统及控制方法。控制装置是控制向电动机输出电力的转换器的控制装置,其中,基于电动机驱动转矩、电动机的转速及直流电压来算出单脉冲控制时的驱动电流的大小,从而决定采用单脉冲控制及脉冲宽度调制控制中的哪一种控制作为转换器的控制方式。(The invention provides a control device, a vehicle system and a control method, which can restrain excessive current and improve the efficiency of motor control. The control device is a control device that controls a converter that outputs electric power to a motor, and determines which of single pulse control and pulse width modulation control is to be adopted as a control method of the converter by calculating a magnitude of a drive current in the single pulse control based on a motor drive torque, a rotation speed of the motor, and a direct current voltage.)

1. A control device for controlling a converter for outputting electric power to a motor,

the magnitude of the drive current in the single-pulse control is calculated based on the motor drive torque, the rotational speed of the motor, and the dc voltage, and it is determined which of the single-pulse control and the pulse width modulation control is adopted as the control method of the converter.

2. The control device according to claim 1,

when the magnitude of the drive current is smaller than a predetermined upper limit value, the driving is performed by the single pulse control.

3. The control device according to claim 1,

an excessive current suppression calculation map that indicates a range in which single-pulse control is possible by a correspondence relationship between the motor drive torque, the rotation speed, and the direct-current voltage,

the control method is characterized in that which of the single pulse control and the pulse width modulation control is to be adopted is determined by comparing a range of the rotation speed, which is calculated based on the excessive current suppression calculation map, the motor drive torque, and the dc voltage and is capable of performing the single pulse control, with the rotation speed.

4. The control device according to claim 1,

an excessive current suppression calculation map that indicates a range in which single-pulse control is possible by a correspondence relationship between the motor drive torque, the rotation speed, and the direct-current voltage,

the control method may further include determining which of the single pulse control and the pulse width modulation control is to be adopted by comparing a range of the motor drive torque, which is calculated based on the excessive current suppression calculation map, the rotation speed, and the dc voltage and is capable of performing the single pulse control, with the motor drive torque.

5. A vehicle system is characterized by comprising:

the control device according to any one of claims 1 to 4; and

a drive wheel driven by the control device.

6. A control method is characterized in that,

the control device executes the following processing:

a converter that controls the output of electric power to the motor,

calculating the magnitude of a drive current in single-pulse control based on a motor drive torque, the rotational speed of the motor, and a DC voltage,

by calculating the magnitude of the drive current, it is determined which of monopulse control and pulse width modulation control is to be adopted as a control method of the converter.

Technical Field

The invention relates to a control device, a vehicle system and a control method.

Background

Conventionally, a technique related to drive control of an electric vehicle is known (for example, see patent document 1).

[ Prior art documents ]

[ patent document ]

[ patent document 1 ]

Japanese laid-open patent publication No. 2009-100548

The above-described conventional electric vehicle performs control using single pulse control in controlling the inverter circuit for driving the motor. In general, it is known that when single-pulse control is used, the efficiency (e.g., power consumption) of motor control is improved as compared with the case where multi-pulse control such as PWM control is used.

However, in the electric vehicle according to the conventional technique, if the single pulse control is used, an excessive current may flow in the motor. Therefore, in the conventional technology, in order to avoid an excessive current flowing in the motor, there is a problem that it is difficult to use the single pulse control and the efficiency of the motor control cannot be improved.

Disclosure of Invention

The present invention has been made in view of such circumstances, and an object thereof is to provide a control device capable of improving efficiency of motor control while suppressing an excessive current.

[ MEANS FOR SOLVING PROBLEMS ] to solve the problems

In order to solve the above problem, the voltage conversion circuit of the present invention has the following configuration.

(1) A control device according to one aspect is a control device for controlling a converter that outputs electric power to a motor, wherein a magnitude of a drive current in a single pulse control is calculated based on the motor drive torque, a rotation speed of the motor, and a dc voltage, and a control method of the converter is determined by which of the single pulse control and the pulse width modulation control is adopted.

(2) The control device described in (1) above employs the single pulse control when the magnitude of the drive current is smaller than a predetermined upper limit value.

(3) The control device described in (1) above has an excessive current suppression calculation map indicating a range in which monopulse control is possible by a correspondence relationship between the motor drive torque, the rotation speed, and the dc voltage, and determines which of the monopulse control and the pulse width modulation control is to be adopted by comparing the rotation speed and the range of the rotation speed in which monopulse control is possible, calculated based on the excessive current suppression calculation map, the motor drive torque, and the dc voltage.

(4) The control device described in (1) above has an excessive current suppression calculation map indicating a range in which single pulse control is possible by a correspondence relationship between the motor drive torque, the rotation speed, and the dc voltage, and determines which of the single pulse control and the pulse width modulation control is to be adopted by comparing the motor drive torque and the range of the motor drive torque in which single pulse control is possible, which is calculated based on the excessive current suppression calculation map, the rotation speed, and the dc voltage.

(5) A vehicle system is provided with: the control device according to any one of (1) to (4) above; and a drive wheel driven by the control device.

(6) In the control method according to one aspect, the control device performs the following control: a converter for controlling an output of electric power to a motor calculates a magnitude of a drive current in a single pulse control based on a motor drive torque, a rotational speed of the motor, and a DC voltage, and determines which of the single pulse control and the pulse width modulation control is to be adopted as a control method of the converter based on the drive current having the calculated magnitude.

[ Effect of the invention ]

According to the aspects (1) to (6), it is possible to provide a control device, a vehicle system, and a control method that can improve the efficiency of motor control while suppressing an excessive current.

Drawings

Fig. 1 is a diagram showing an example of a functional configuration of a vehicle control device according to an embodiment.

Fig. 2 is a diagram showing an example of a functional configuration of the control device in the embodiment.

Fig. 3 is a diagram showing an example of a voltage waveform of the sine wave PWM control in the embodiment.

Fig. 4 is a diagram illustrating an example of a voltage waveform of overmodulation PWM control in the embodiment.

Fig. 5 is a diagram showing an example of a voltage waveform of the single pulse control in the embodiment.

Fig. 6 is a diagram showing an example of a calculation formula of the drive current in the single pulse control in the embodiment.

Fig. 7 is a diagram showing an example of the procedure of determining the availability of the single-pulse control based on the dc voltage and the motor drive torque in the embodiment.

Fig. 8 is a diagram showing an example of the procedure of determining the availability of the single-pulse control based on the dc voltage and the rotation speed of the motor in the embodiment.

Fig. 9 is a diagram showing an example of a series of operations of the single-pulse drive determination by the single-pulse request determination unit in the embodiment.

Fig. 10 is a diagram showing an example of the operation of judging the possibility of the driving current in the single pulse control according to the embodiment.

Fig. 11 is a diagram illustrating an example of the operation of determining the availability based on the dc voltage and the rotation speed in the embodiment.

Fig. 12 is a diagram showing an example of the operation of determining the availability based on the dc voltage and the motor drive torque in the embodiment.

Detailed Description