Cost-reducing and energy-saving bldc motor isolation power supply structure voltage adjustment method

Abstract

The invention provides a cost-reduction and energy-saving isolation power supply structure of a brushless DC electric motor (BLDC). The cost-reduction and energy-saving isolation power supply structure comprise a power rectification module, a primary winding module, an auxiliary winding module, a secondary 5V winding module, a transformer, an energy-saving electronic switch module and a BLDC interface. The transformer structure of a switching power supply, provided by the invention comprises a primary winding, an auxiliary winding and a secondary 5V winding. Compared with a conventional design, the structure has the advantages that a copper wire of a secondary 15V winding is saved, the material resource is saved, the size of the transformer is also reduced, meanwhile, all component materials of rectification, filtering and voltage stabilization circuits of the 15V winding are saved, the circuit design cost is reduced, the component occupancy area of a circuit board is reduced, the product cost is finally reduced, and the cost-reduction optimization design is achieved.

Description

technical field [0001] The invention relates to a BLDC motor power supply circuit, in particular to a voltage adjustment method for an isolated power supply structure of a cost-reducing and energy-saving BLDC motor. Background technique [0002] The BLDC brushless DC motor interface includes 5 wires: 310V, PGND, 15VDC, VSP, FG; among them: 310V: 220V power input after rectification and filtering is about 310VDC high voltage, which is the main power source of the BLDC motor; PGND: as the public Ground, these 5 lines are required to use PGND as the common ground; 15VDC: BLDC motor internal control IC power supply; general standby power consumption is about 0.4W; VSP: the speed regulation voltage provided by the external application control circuit to the BLDC motor; FG : The speed pulse signal output by the BLDC motor is supplied to the external control circuit for speed detection. [0003] In the prior art, generally adopt such as figure 1 For the isolated switching power s...

AI Technical Summary

Problems solved by technology

[0010] (7) When the 15VDC power supply is not disconnected, as long as the 15VDC power supply is input to the BLDC motor, it will still consume about 0.4W even when the BLDC motor is in a stopped state. It is a waste of power resources, which violates the environmental protection design concept of energy saving and consumption reduction

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