Locked rotor frequency conversion control method and device for drive motors

A technology for driving motors and control methods, which is applied to control driving, electric vehicles, power management, etc., can solve problems such as torque command value distortion, vehicle jitter, etc., to solve the problem of temperature rise, ensure load demand, and ensure safety and comfort. sexual effect

Active Publication Date: 2015-10-21
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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Problems solved by technology

This kind of jitter cannot cause the whole vehicle to jitter in a very short time, but if the electric vehicle is always in the critical working condition of locked rotor and non-locked rotor, the

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  • Locked rotor frequency conversion control method and device for drive motors
  • Locked rotor frequency conversion control method and device for drive motors
  • Locked rotor frequency conversion control method and device for drive motors

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[0052] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0053] The working principle of the drive system of an electric vehicle can be as simple as figure 1 As shown, the vehicle controller gives the torque according to the accelerator pedal opening and the motor speed signal. After the drive motor controller receives the torque command, it controls the drive motor to output the corresponding torque under the condition that the drive system is not faulty. More details These steps are to obtain a set of Id and Iq from the torque value at the current speed by looking up the table (the relationship table between motor torque and current), and then through the space vector algorithm, the controller U, V, W three-phase current.

[0054] figure 2 The basic block diagram of the vector control of the drive motor controller. First of all, the drive motor controller will obtain the actual torque value that the motor...

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Abstract

The invention discloses a locked rotor frequency conversion control method and device for drive motors. By means of the locked rotor frequency conversion control method and device, entry and exit of locked rotor frequency conversion are judged through the locked rotor rotating speed zone bit and the locked rotor torque zone bit, and therefore the temperature rise problem of a drive controller in the blocked rotor process is effectively solved. Thus, the time spent when a drive motor outputs large torque is prolonged as much as possible, and the load requirement is guaranteed. Meanwhile, the entry time and the exit time of locked rotor frequency conversion are staggered, the vehicle shaking problem under the critical working condition is solved, and driving safety and comfort are ensured.

Description

technical field [0001] The invention belongs to the field of electric vehicle drive motor control, in particular to a drive motor blocking frequency control method and device Background technique [0002] The development and application of electric vehicle drive stall frequency technology solves the IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) over-temperature protection when the drive motor controller is in stall, thus avoiding the IGBT over-temperature protection caused by A series of security risks. Usually the IGBT switching frequency in the drive motor controller is 10K. The vehicle controller sends a torque command to the drive motor controller according to the accelerator pedal signal and the vehicle speed signal (obtained from the conversion of the motor speed). When the rotor is locked, the driver will increase the throttle, the torque command received by the drive motor controller will increase, and the current of the IGBT will also...

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Application Information

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IPC IPC(8): B60L15/20
CPCY02T10/72
Inventor 艾敬尧肖梦郭航程胜民
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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