阅读说明：本技术 一种包含独立电机驱动授权的门控制单元电机回路 (Door control unit motor loop containing independent motor drive authorization ) 是由 姚奇 杨燕 石文博 胡文杰 高文静 于 2020-12-02 设计创作，主要内容包括：本发明公开了一种包含独立电机驱动授权的门控制单元电机回路,包括电机驱动回路,电机电源通过电机驱动回路连接电机,还包括CPLD芯片和应用芯片；所述CPLD芯片和所述应用芯片相互并接,而者的输入端分别与列车控制信号连接,所述CPLD芯片输出电机驱动授权信号,所述应用芯片输出电机驱动PWM信号,二者的输出端分别接入一个与门判断电路,所述与门判断电路的输出端与所述电机驱动回路连接,所述电机驱动回路连接电机。本发明能够避免由于单芯片的故障而导致车门意外开门的事故。(The invention discloses a gate control unit motor loop containing independent motor drive authorization, which comprises a motor drive loop, a CPLD chip and an application chip, wherein a motor power supply is connected with a motor through the motor drive loop; the CPLD chip and the application chip are connected in parallel, the input ends of the CPLD chip and the application chip are respectively connected with train control signals, the CPLD chip outputs motor drive authorization signals, the application chip outputs motor drive PWM signals, the output ends of the CPLD chip and the application chip are respectively connected with an AND gate judgment circuit, the output end of the AND gate judgment circuit is connected with the motor drive loop, and the motor drive loop is connected with a motor. The invention can avoid the accident of accidental door opening of the vehicle door caused by the fault of the single chip.)

1. A door control unit motor loop containing independent motor drive authorization comprises a motor drive loop, a motor power supply is connected with a motor through the motor drive loop, and the door control unit motor loop is characterized by further comprising a CPLD chip and an application chip;

the CPLD chip and the application chip are connected in parallel, the input ends of the CPLD chip and the application chip are respectively connected with train control signals, the CPLD chip outputs motor drive authorization signals, the application chip outputs motor drive PWM signals, the output ends of the CPLD chip and the application chip are respectively connected with an AND gate judgment circuit, the output end of the AND gate judgment circuit is connected with the motor drive loop, and the motor drive loop is connected with a motor.

2. A door control unit motor circuit including independent motor drive authority as claimed in claim 1, wherein said motor drive authority signal physically shuts off each phase of motor drive bridge in the unauthorized case, and in the authorized case, the CPU provides the motor drive signal to drive the motor drive circuit properly.

3. The motor loop of door control unit including independent motor driving authority of claim 1, wherein said CPLD chip and application chip are connected to each other, said motor driving authority signal is monitored by said application chip for reporting error frequently when abnormal state occurs, said motor driving PWM signal is monitored by said CPLD chip for reporting error frequently when abnormal state occurs.

4. A door control unit motor circuit including independent motor drive authority in accordance with claim 1, wherein said motor drive circuit is a two/three phase drive bridge.

Technical Field

The invention relates to a motor loop of a door control unit containing independent motor drive authorization, which is used in the field of rail transit signal control.

Background

Train door systems are safety-relevant systems, which are particularly important for the design of safety-relevant functions. On the market today, train door control units are responsible for safety events: protection against accidental opening of the door (malfunction of the motor) is often insufficient. The common design is that a single integrated motor driving chip is used for driving a motor and a CPU directly gives a motor control command (although some controllers are known to be internally preset with auxiliary safety protection equipment, the independence of the auxiliary safety protection equipment from the motor control command given by the CPU is not enough), and the designs all have the risk that a single part causes the accidental opening of the train door: if the motor driving chip fails, the motor can open the door by accidental action.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a motor loop of a door control unit comprising independent motor drive authorization, which can avoid the accident of accidental door opening of a vehicle door caused by the fault of a single chip.

One technical scheme for achieving the above purpose is as follows: a door control unit motor loop containing independent motor drive authorization comprises a motor drive loop, a motor power supply, a CPLD chip and an application chip, wherein the motor power supply is connected with a motor through the motor drive loop;

the CPLD chip and the application chip are connected in parallel, the input ends of the CPLD chip and the application chip are respectively connected with train control signals, the CPLD chip outputs motor drive authorization signals, the application chip outputs motor drive PWM signals, the output ends of the CPLD chip and the application chip are respectively connected with an AND gate judgment circuit, the output end of the AND gate judgment circuit is connected with the motor drive loop, and the motor drive loop is connected with a motor.

Further, the motor driving authorization signal physically turns off each phase of motor driving bridge under the unauthorized condition, and the motor driving signal given by the CPU drives the motor driving loop correctly under the authorized condition.

Furthermore, the CPLD chip and the application chip are connected with each other, the motor driving authorization signal is monitored by the application chip to report errors frequently due to abnormal states, and the motor driving PWM signal is monitored by the CPLD chip to report errors frequently due to abnormal states.

Further, the motor driving circuit is a two-phase/three-phase driving axle.

The door control unit motor loop containing the independent motor drive authorization adopts standard motor bridge type drive instead of an integrated drive chip and adopts an independent CPLD chip for drive authorization, thereby avoiding the accident of accidental door opening of a vehicle door caused by the fault of a single chip. The door control unit is internally provided with a completely independent CPLD authorization motor driving loop which is combined with a chip control signal, so that a redundant authorization and protection mode is provided, the probability of safety risk events caused by accidental opening of the door (motor misoperation) is reduced to a very low level, and the possibility of the safety events caused by the failure of a single device is eliminated.

Drawings

FIG. 1 is a schematic structural diagram of a door control unit motor circuit including independent motor drive authorization according to the present invention.

Detailed Description

In order to better understand the technical solution of the present invention, the following detailed description is made by specific examples:

the invention relates to a motor loop of a door control unit, which comprises independent motor drive authorization and is used for providing a redundant authorization and protection mode for an input train control signal. The train control signals mainly include, but are not limited to, control signals for a drive motor of a track traffic door system.

Referring to fig. 1, a train control signal 1 is respectively input to an application chip 2 and a CPLD chip 3. The application chip 2 gives corresponding PWM driving signals to the driving of a two-phase driving axle of a motor driving circuit according to the control instruction of the train; the CPLD chip 3 gives corresponding authorization signals to the drive of the two-phase drive axle of the motor drive loop according to the control instruction of the train, the authorization signals can physically cut off each phase of motor drive axle under the unauthorized condition, and the motor drive signals given by the CPU can correctly drive the motor axle under the authorized condition. Meanwhile, the real-time running state of the CPLD chip 3 is monitored by CPU software, and once the CPLD chip 3 fails to provide protection continuously, the external alarm is given in time. The output ends of the application chip 2 and the CPLD chip 3 are respectively connected with an AND gate judgment circuit 4, the output end of the AND gate judgment circuit 4 is connected with a motor driving circuit 5, and the motor driving circuit 5 is a two-phase/three-phase drive bridge. The motor driving loop 5 is connected with a power supply 6 and a motor 7.

Meanwhile, the CPLD chip 3 and the application chip 2 are connected with each other to realize cross monitoring. The motor driving authorization signal is monitored by the application chip 2 to report errors frequently due to abnormal states, and the motor driving PWM signal is monitored by the CPLD chip 3 to report errors frequently due to abnormal states.

The specific implementation mode of the invention is as follows:

the independent CPLD chip collects control signals of the train, inputs the signals into a predefined judgment formula and provides motor driving authorization signals. If the motor driving condition is met, the CPLD chip can give out a driving authorization signal of a corresponding motor two-phase/three-phase driving axle; if the motor driving condition is not met, the CPLD chip does not give a corresponding authorization signal.

And the application chip acquires a control signal of the train and outputs a PWM driving signal according to the judgment logic. If the motor driving condition is met, outputting a PMW driving signal; if the motor driving condition is not satisfied, the PMW driving signal is not output.

And the two-phase drive axle loop of the motor can carry out corresponding motor drive according to the received hard wire signals from the two independent chips. When the authorization signal given by the CPLD is consistent with the PWM driving signal given by the application chip, the two-phase/three-phase driving bridge of the motor can be normally switched on and off, so that the motor is driven to operate; when the authorization signal given by the CPLD is inconsistent with the PWM driving signal given by the application chip, the two-phase driving bridge of the motor can not be switched on, so that the motor can not be driven to operate.

The authorization signal of the CPLD chip can be monitored by the application chip in real time through a signal feedback loop. When the application chip finds that the authorization signal of the CPLD is not in accordance with the normal authorization logic, fault reporting is carried out; meanwhile, the application chip can monitor the state of the CPLD chip in real time through the communication signal, and if the state of the CPLD chip is abnormal, the application chip can report faults.

Above design has guaranteed that single point trouble in whole motor circuit can not lead to the unexpected door opening of the door that the unusual drive of motor and further lead to.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.