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1. (WO2018160950) MOTOR STARTING CIRCUITS, MOTOR CONTROL ASSEMBLIES, AND GRINDER PUMP ASSEMBLIES EMPLOYING SAME

Pub. No.:    WO/2018/160950    International Application No.:    PCT/US2018/020637
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Sat Mar 03 00:59:59 CET 2018
IPC: H02P 1/44
H02H 3/08
H02H 7/085
Applicants: ENVIRONMENT ONE CORPORATION
Inventors: KOEGLER, John H.
Title: MOTOR STARTING CIRCUITS, MOTOR CONTROL ASSEMBLIES, AND GRINDER PUMP ASSEMBLIES EMPLOYING SAME
Abstract:
A motor control assembly (700, 900) may include a transformer (930) having a primary winding (932) through which AC power to a run winding of the motor passes, an AC current sensing circuit (770, 1000) connected to a secondary winding (934) of the transformer, and a solid state motor start circuit (770, 970) selectively controlling AC power to a start capacitor (780, 980) and to a start winding of the motor. A DC coil driver circuit (744, 944) is operable for supplying a DC current to a DC relay (742, 942) for controlling AC power to the run winding of the motor. An AC voltage monitoring circuit (741, 941) is operably connected to the AC power supply for monitoring AC voltage from the AC power supply. A coil driver inhibitor circuit (746, 946) is operable to shunt the DC relay in response to the AC voltage monitoring circuit.