Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1990-03-09
1991-09-17
Ip, Paul
Electricity: motive power systems
Induction motor systems
Primary circuit control
318782, 318793, 318772, 236DIG9, 236 493, H02P 144, F24F 700
Patent
active
050498010
ABSTRACT:
A controller for a dual speed induction motor selectively applies operating power to the low speed motor terminal or the high speed motor terminal according to the open circuit/closed circuit condition of a low temperature thermostat and a high temperature thermostat. For low speed operation, operating power is conditionally applied to the low speed motor terminal through the low temperature thermostat and through the normally closed circuit of a single pole, double throw switch. For high speed operation, operating power is conditionally applied to the high speed motor terminal through the high temperature thermostat and the normally open circuit of the single pole, double throw switch. The operating position of the single pole, double throw switch is determined by a solenoid which is connected in series circuit relation with the high temperature thermostat.
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Clark United Corporation
Griggs Dennis T.
Ip Paul
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