Motor control system capable of efficiently recovering kinetic energy and control method thereof
A motor control and high-efficiency technology, which is applied in the direction of motor generator control, control system, electric braking system, etc., can solve the problems of lower kinetic energy recovery rate, high cost, and power loss of DC converter, so as to reduce cost and improve range effect on efficiency
Inactive Publication Date: 2011-12-07
NANJING UNIV OF SCI & TECH
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Problems solved by technology
[0005] 2. High-power DC converters are not only huge in size, but also costly
[0006] 3. There is power loss in the DC converter itself, which greatly reduces the recovery rate of kinetic energy
And the wider the voltage transformation range, the larger the volume of the required inductive element and the higher the loss
Method used
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[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0022] Depend on figure 1 As shown, a motor control system capable of efficiently recovering kinetic energy of the present invention includes an electronic control unit 20, a main control circuit 10, and a controlled motor 30. The main control circuit 10 includes an H-type full-bridge circuit 11, a low-voltage circuit 12, The high-voltage circuit 13, the full-bridge circuit 11, the low-voltage circuit 12, and the high-voltage circuit 13 are connected in parallel with each other through the DC bus 14, and the three input terminals of the main control circuit are respectively the first input terminal in1 of the full-bridge circuit 11 and the second input terminal of the low-voltage circuit 12 terminal in2, the third input terminal in3 of the high-voltage circuit 13; the analog signal input terminal Ai of the electronic control unit 20 is connected to the analo...
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A motor control system that can realize efficient recovery of kinetic energy disclosed in the present invention includes an electronic control unit, a main control circuit, and a controlled motor. The main control circuit includes an H-type full-bridge circuit, a low-voltage circuit, and a high-voltage circuit. The above three circuits The three input terminals of the main control circuit are the first input terminal of the full bridge circuit, the second input terminal of the low-voltage circuit, and the third input terminal of the high-voltage circuit; the analog signal input terminal of the electronic control unit is connected to The analog signal output terminal of the controlled motor; the first output terminal of the electronic control unit is connected to the first input terminal of the full bridge circuit, the second output terminal of the electronic control unit is connected to the second input terminal of the low-voltage circuit, and the third output terminal of the electronic control unit is The terminal is connected to the third input terminal of the high-voltage circuit; the voltage terminal of the full bridge circuit is the output terminal of the main control circuit. The invention does not need to use a high-power DC converter, and can improve the range and efficiency of kinetic energy recovery by means of the freewheeling effect of the motor's own inductance.
Description
technical field [0001] The invention relates to a motor control system and a control method thereof, in particular to a motor control control system and a control method thereof capable of realizing efficient recovery of kinetic energy. Background technique [0002] The electric vehicle uses the motor as the power device, and the motor control system controls the motor to output a certain torque and speed according to the instructions. In order to maximize the mileage of the vehicle on one charge, the motor control system must not only ensure the high performance of the motor in the electric state, but also ensure the efficient regenerative power generation performance of the motor in the braking state. [0003] At present, electric vehicles mainly use two speed regulation schemes of DC chopping and AC frequency conversion. In theory, both solutions can recover kinetic energy and feed it back to the electric energy storage system when the vehicle is going downhill or decele...
Claims
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IPC IPC(8): H02P3/18B60L7/14
CPCY02T10/642Y02T10/64
Inventor 徐照平常思勤
Owner NANJING UNIV OF SCI & TECH