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Patent

Permanent magnet synchronous motor controller for automobile

07 Jan 2015-
TL;DR: In this article, a permanent magnet synchronous motor controller for an electric automobile is presented, which is composed of a power main circuit, a control circuit, drive circuit, and a switch power source.
Abstract: The invention relates to a permanent magnet synchronous motor controller for an electric automobile. The permanent magnet synchronous motor controller is mainly composed of a power main circuit, a control circuit, a drive circuit and a switch power source. The power main circuit is based on a three-phase full bridge inverter topological structure, and a control circuit board is based on the design of a DSP and a CPLD. A motor controller receives a control mode and a target torque instruction sent by an automobile control unit through a CAN bus, and a current instruction is obtained through analysis. Then, on-off of an IGBT is controlled based on a vector control algorithm and a pulse width modulation strategy, and therefore control over the current and the torque of the permanent magnet synchronous motor controller is achieved. Meanwhile, through signal detection and processing, self-protection and fault diagnosis to the motor controller and a motor are achieved. In addition, the operation state of the motor controller and the operation state of the motor are fed back to the automobile control unit through the CAN bus. The permanent magnet synchronous motor controller for the electric automobile is simple in design, reliable in performance, and capable of guaranteeing the safety of the entire automobile.
Citations
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Patent
06 Oct 2015
TL;DR: In this paper, a motor controller for use in a motor system includes a mode select circuit, fault detection circuit, a protection logic circuit, and a motor control circuit, which is used to control the motor of the motor system in response to a speed control signal when the protection signal is inactive.
Abstract: A motor controller for use in a motor system includes a mode select circuit, a fault detection circuit, a protection logic circuit, and a motor control circuit. The mode select circuit sets the motor controller in one of an internal protection mode and an external protection mode. The fault detection circuit detects whether the motor system is operating in a normal operation state or a fault state. If the motor system is operating in the fault state, the protection logic circuit outputs a protection signal in the internal protection mode, and keeps the protection signal inactive while activating an external diagnostic signal in the external protection mode. The motor control circuit controls a motor of the motor system in response to a speed control signal when the protection signal is inactive, and in response to the protection signal when the protection signal is active.

6 citations

Patent
22 Mar 2017
TL;DR: In this paper, a permanent magnet synchronous motor (PMSM) data communication system and method based on a Modbus RTU protocol is presented. But the method is not suitable for high-speed data transmission.
Abstract: The invention discloses a permanent magnet synchronous motor (PMSM) data communication system and method based on a Modbus RTU protocol. The data communication system comprises a PMSM control board, an external device touch screen, an isolated RS485 protocol conversion chip ADM2587 and a twisted-pair cable. The method realizes the Modbus RTU protocol by combining timer interrupt and serial port receiving interrupt, and realizes bidirectional data interaction between the PMSM control system and the external device touch screen by using the Modbus RTU protocol. Thus, a fully functional PMSM engineering communication method integrating speed control, fault monitoring, instruction input, system status display and the like is formed. The PMSM control system may communicate with a device manufactured by any manufacturer and supporting the Modbus RTU protocol, and is good in scalability, accurate in transmission data, and stable and reliable.

3 citations

Patent
22 Mar 2017
TL;DR: In this paper, a permanent magnet synchronous motor (PMSM) vector decoupling controller for an electromobile based on a digital signal processor (DSP) is presented.
Abstract: The invention discloses a permanent magnet synchronous motor (PMSM) vector decoupling controller for an electromobile based on a DSP (Digital Signal Processor). The controller is based on a DSP chip and comprises a DSP power supply, a serial port communication circuit, a power main circuit, a signal detection circuit, a protection circuit and a CAN (Controller Area Network) communication interface circuit; the controller receives a motor control mode and a torque parameter from a VCU (Vector Control Unit) on a bus; the DSP chip accomplishes corresponding vector control, current speed ring control and an SVPWM (Space Vector Pulse Width Modulation) algorithm; an output PWM signal controls on-off of a power electronic device in an inverter circuit, thereby controlling a PMSM; a current and voltage detection circuit realizes self-protection and fault diagnosis by the protection circuit by acquiring real-time voltage and current parameters of the PMSM; a photoelectric encoder obtains an electrical angle and a rotating speed feedback value by acquiring position and rotating speed parameters of the PMSM; and finally the real-time status of motor control is fed back to the VCU by the CAN communication interface circuit. With the adoption of the controller, a PMSM control system for the electromobile has the advantages of high performance, high reliability, convenience in maintenance and full digitalization.

3 citations

Patent
23 Dec 2015
TL;DR: In this article, an automobile controller for failure protection of a DSP chip and a control method thereof is presented, where a microprocessor module is connected with an MOSFET driving circuit.
Abstract: The invention provides an automobile controller for failure protection of a DSP chip and a control method thereof. The automobile controller comprises a speed sensor, etc. A microprocessor module is connected with an MOSFET driving circuit. A current, voltage and temperature detection circuit, a speed regulating braking signal controller, a speed detection circuit, an external watchdog circuit and a shift input device are connected with the microprocessor module. The microprocessor module is connected with a contactor driving circuit. The contactor driving circuit is connected with the shift input device, the external watchdog circuit and the MOSEFT driving circuit. The speed detection circuit is connected with the speed sensor. The speed sensor is connected with a DC motor. Real-time monitoring is performed on automobile control so that safety and reliability and stability of the controller can be enhanced.

3 citations

Patent
Sakashita Tomio1
12 Oct 2017
TL;DR: In this paper, a motor drive device capable of suppressing current consumption and increase of cost without delaying the start-up time is provided with multiple inverter circuits, multiple relay circuits, and a control unit.
Abstract: Provided is a motor drive device capable of suppressing current consumption and increase of cost without delaying the start-up time The motor drive device is provided with multiple inverter circuits, multiple relay circuits, multiple power-supply-stabilizing capacitors, multiple precharge circuits, and a control unit The inverter circuits drive a motor including multiple winding sets by separately using the winding sets The relay circuits are provided between a power supply and the respective inverter circuits The capacitors are provided between the respective relay circuits and the respective inverter circuits The precharge circuits are provided so as to correspond to the capacitors, and charge the respective capacitors before the relay circuits are driven The control unit is configured to control the precharge circuits at the time of diagnosis of the relay circuits such that: the precharge circuits charge the respective capacitors while causing the timings, at which the precharge circuits charge the respective capacitors, not to coincide with each other; or the precharge circuits charge the respective capacitors alternately

2 citations