Parameter identification method for hybrid stepping motor
A stepping motor and parameter identification technology, which is applied in the field of motor parameter identification, can solve the problem of low accuracy of parameter identification methods, achieve the effect of improving accuracy and solving large voltage errors
Active Publication Date: 2017-07-04
深圳市杰美康机电有限公司
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Problems solved by technology
[0022] The invention provides a parameter identification method of a hybrid stepping motor, which solves the problem that the accuracy of the parameter identification method of the existing hybrid stepping motor is not high
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[0068] The present invention will be further described below in conjunction with embodiment.
[0069] A parameter identification method for a hybrid stepping motor, comprising the steps of:
[0070] Step 1: Analyze the internal circuit of the hybrid stepping motor and draw the equivalent circuit of one phase of the hybrid stepping motor. Such as figure 1 As shown, the equivalent circuit includes a resistance R and an inductance L, and the resistance R and the inductance L are connected in series, and this phase is defined as a phase A.
[0071] Step 2: At time t0, through the inverter circuit, give a slow rising current to Ib, and then pass a stable current Ib to flow through the A phase, such as Figure 6 As shown, the current Ib flows from V1 into A phase and then into V4 and finally grounded, where Ib is a given input current, V1 is a PWM control terminal, V4 is a PWM control terminal, and the current is DC. Such as figure 2 As shown, V1 and V4 are on, and V2 and V3 ar...
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The invention provides a parameter identification method for a hybrid stepping motor, and belongs to the field of motor parameter identification. The method comprises the steps of drawing one phase of equivalent circuit of the hybrid stepping motor by analysis of the internal circuit of the hybrid stepping motor; at a moment of t0, providing a slowly rising current to Ib through an inversion circuit, and then enabling the steady current Ib to flow through an A phase, enabling the current Ib to flow to the A phase from V1 and then to flow to V4 and finally to be grounded; at a moment of t1, enabling a current loop to enter V4 from the A phase and then to flow to D3, wherein the output end of the D3 is butt jointed with the A phase and grounded, so that a closed loop can be formed by the A phase and the D3 to enable the current to be decreased; at a moment t2, when the set current is changed into Ia, enabling the set current to be stabilized at Ia through PWM logic; and at the moment, enabling the set current Ia to flow through the A phase from V1 and then to enter V4 and then to be grounded. A resistance value and an inductance value are calculated through voltage difference in two times; and after alignment to the A phase is realized, electrifying is performed in galvanization, so that the problem of relatively high voltage error of the phase of the winding can be effectively solved.
Description
technical field [0001] The invention relates to the field of motor parameter identification, in particular to a method for parameter identification of a hybrid stepping motor. Background technique [0002] As the needs of industrial sites continue to put forward higher requirements, vector control technology is widely used in occasions that require high-performance control of stepper motors. The ultimate goal of vector control is to realize the decoupling of torque and flux linkage control. So as to realize the high-performance control of the stepper motor. Realize the torque and flux linkage control of the stepping motor, but this high-performance control depends largely on the identification accuracy of the stepping motor parameters. [0003] In the case of a hybrid stepping motor, the equivalent circuit of the electrical part of one phase, such as figure 1 shown (neglecting unsaturated linear magnetic circuit and phase mutual inductance). by figure 1 is the equivalen...
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IPC IPC(8): H02P21/14H02P8/00
CPCH02P8/00H02P21/14
Inventor 李金全王申相
Owner 深圳市杰美康机电有限公司