Electro-magnetic doubly salient motor rotor position identification method based on three-phase six-state start
A double-salient motor and rotor position technology, applied in the field of rotor initial position detection and electric drive system control, can solve problems such as motor starting out of step and rotor reversal
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[0047] The system structure diagram of this patent is as follows figure 1 As shown, it is mainly composed of four parts: (1) three-phase full bridge power circuit module; (2) three-phase electric excitation double salient motor; (3) DSP control and drive module; (4) conditioning circuit.
[0048] The initial position estimation system for the positionless rotor of a three-phase electric excitation double salient motor mainly includes the above four parts. Through two injections of low-voltage pulse vectors, it detects and compares (at most) the magnitude of the voltage response amplitude of the three non-conduction phase terminals. The 60° sector where the rotor is located can be identified. This method is simple, practical, economical and convenient. The control system adopts a DSP full digital control system.
[0049] The specific implementation steps are as follows:
[0050] 1. First, perform the 120° accuracy positioning of the rotor:
[0051] ①Turn on the switch tubes T1 and T2, ...
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