Motor controller and controlling method thereof

A motor controller and core control technology, applied in the direction of motor speed or torque control, control system, electrical components, etc., can solve problems such as motor controller overcurrent, damage to electrical equipment, and controller not working properly. Achieve the effect of protecting the motor

Inactive Publication Date: 2005-12-14
BYD CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

Especially when the brushless motor is in the commutation process, due to its own structure (compared with ordinary DC motors, there are no carbon brushes and commutation poles), the commutation current usu...

Method used

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  • Motor controller and controlling method thereof
  • Motor controller and controlling method thereof
  • Motor controller and controlling method thereof

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Embodiment Construction

[0028] The present invention is further described below.

[0029] A motor controller provided by the present invention is used for overcurrent safety protection of brushless DC motors of electric vehicles, please refer to figure 1 , the motor controller includes: a core control chip 1 and a drive module 2, and the output of the core control chip 1 is connected to the drive module 2 to control it, and the drive module 2 is connected to the motor 3 to output drive.

[0030] The core control chip 1 adopts a model of MC33035, which is specially used for motor control integrated circuits of DC brushless motors. The integrated circuit has a comparator inside, and two different current values ​​can be input through pin 9 and pin 15 for comparison and judgment. Here, the 15th pin is the reference protection current input pin (Current Sense Inverting Input), which is the preset protection current reference value. After testing, the reference protection current is usually set to a fixe...

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Abstract

The present invention discloses one kind of motor controller and its control method. The controller includes one kernel control chip with comparator, one speed/current processor, one reference current sampling circuit, and one drive module. The kernel control chip has outer current input pin for collecting the current value of running motor and reference protecting current input pin for collecting the reference value of the protecting current; the speed/current processor is for collecting the rotation speed pulse signal of the motor and converting it into current signal; the reference current sampling circuit is for treating the current signal; the comparator compares the above said two current values to output control command to the drive module for switching off the output or keeping normal output; and the drive module receives the control command from the kernel control chip for drive control of the motor.

Description

【Technical field】 [0001] The invention relates to a motor controller and a control method thereof, in particular to a motor controller and a control method thereof for overcurrent safety protection for a DC brushless motor of an electric vehicle. 【Background technique】 [0002] The motor of an electric vehicle usually adopts a DC brushless motor. During the process of controlling the motor, due to various control needs, the motor is in different operating states, and the motor current changes greatly. Especially when the brushless motor is in the commutation process, due to its own structure (compared with ordinary DC motors, there are no carbon brushes and commutation poles), the commutation current usually has 2 to 4 times the average current. , The peak value is very high, and the motor controller is prone to overcurrent, which makes the controller unable to work normally, and may damage electrical equipment. [0003] For this reason, how to avoid the above-mentioned pro...

Claims

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Application Information

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Inventor 谭先华王淳马先红傅烽伟王传福张金涛
Owner BYD CO LTD
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