Brushless DC pump with enclosed circuit board

Details Brushless DC pump with enclosed circuit board Brushless DC pump with enclosed circuit board

1989-07-10

1991-03-12

Smith, Leonard E.

Pumps

Motor driven

Electric or magnetic motor

41742314, 417366, 417372, 310 51, F04B 3900, F04B 1700

Patent

active

049988654

ABSTRACT:
A motor-driven pump including a pump housing; a brushless motor mounted in the pump housing; pump means mounted in the pump housing and adapted to be driven by the brushless motor; and a circuit package mounted in a liquid passage defined in the pump housing, the circuit package enclosing a circuit board mounting thereon a control circuit for controlling rotation of the brushless motor and means for detecting a rotor position of the brushless motor, wherein the circuit board is fixed through an elastic member to an inner wall of the circuit package with a gap defined between the circuit board and the inner wall, and the circuit package is opposed to the brushless motor at a position where the circuit board is spaced a distance from the brushless motor in an axial direction of a rotating shaft of the brushless motor.

REFERENCES:
patent: 4005347 (1977-01-01), Erdman
patent: 4726746 (1988-02-01), Takada et al.
patent: 4773829 (1988-09-01), Vettori

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