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A motor control method and electronic device
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A technology of motor control and electronic equipment, applied in the field of electronics, can solve problems such as low precision, unstable motor operation, and low precision of control parameters, and achieve the effect of improving precision and efficiency
Active Publication Date: 2018-01-09
SICHUAN CHANGHONG ELECTRIC CO LTD
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Problems solved by technology
[0005] The present application provides a motor control method and electronic equipment, which are used to solve the problem in the prior art that the calculation result of the square root operation of the processor in the motor control calculation process is not high, and the control parameters generated by the processing have low precision, which is easy to solve. Technical problems causing unstable motor operation
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Embodiment 1
[0038] Please refer to figure 1 , Embodiment 1 of the present application provides a motor control method, including:
[0039] Step 101 "Obtain the back EMF constant K by the motor E , the first inductance value L on the quadrature axis of the motor q , the second inductance value L on the direct axis of the motor d , and the first control current value I on the quadrature axis of the motor q The first array formed.
[0040] When the motor rotates during operation, there must be a coil cutting the magnetic force line, which will generate a counter electromotive force. For a specific motor, the faster the rotation speed, the higher the generated back electromotive voltage, and vice versa, the lower the generated back electromotive voltage. That is to say, the back EMF voltage is proportional to the speed of the motor, and the back EMF constant K E is a parameter representing this proportional relationship. It can be seen that the back EMF constant K E It is the inherent...
Embodiment 2
[0081] Please refer to figure 2 , Embodiment 2 of the present application provides an electronic device, including:
[0082] The sensor 201 is used to obtain the first control current value I on the quadrature axis of the motor q ;
[0083] The processor 202 is used to inquire about the parameters of the motor to obtain the back electromotive force constant K of the motor E , and obtain the first inductance value L on the quadrature axis of the motor q , the second inductance value L on the direct axis of the motor d , obtain the query value N corresponding to the first array, perform a table lookup in the lookup table, and obtain the result value M corresponding to the query value N, based on the first array and the result value M, use basic operations to obtain The second control current value I on the direct axis of the motor d , where the back EMF constant K E , the first inductance value L q , the second inductance value L d , and the first control current value ...
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Abstract
The invention discloses a motor control method and electronic equipment. A query value N corresponding to parameters is obtained by obtaining a counter electromotive force constant K<E> of a motor, a first inductance value L<q> on a quadrature axis of the motor, a second inductance value L<d> on a direct axis of the motor and a first control current value I<q> on the quadrature axis of the motor; lookup is carried out in a pre-stored look-up table with preset accuracy through the query value N to obtain a corresponding square root result value M; finally a second control current value I<d> on the direct axis of the motor with the preset accuracy can be obtained by four basic operations; and other control parameters can be calculated and obtained on the basis of obtaining the control current parameters with the preset accuracy, therefore, the motor control method has the technical effects that the efficiency of obtaining the control current value on the direct axis of the motor is improved; and the accuracy of the obtained control current value on the direct axis of the motor is improved.
Description
technical field [0001] The invention relates to the field of electronic technology, in particular to a motor control method and electronic equipment. Background technique [0002] With the continuous development of science and technology, electronic technology has also developed rapidly, and there are more and more types of electronic products, and people have also enjoyed various conveniences brought by the development of science and technology. Now people can enjoy the comfortable life brought by the development of science and technology through various types of electronic devices. [0003] At present, the permanent magnet brushless motor in the prior art generally adopts the maximum torque control method, and the square root operation needs to be involved in the process of calculating the torque by the processor, and when the processor calculates the control voltage vector of the motor, it also needs Do the square root operation, for example, to calculate the control vol...
Claims
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Application Information
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