GB1250575A - - Google Patents

Info

Publication number
GB1250575A
GB1250575A GB1250575DA GB1250575A GB 1250575 A GB1250575 A GB 1250575A GB 1250575D A GB1250575D A GB 1250575DA GB 1250575 A GB1250575 A GB 1250575A
Authority
GB
United Kingdom
Prior art keywords
switch
motor
thermostat
supply
june
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of GB1250575A publication Critical patent/GB1250575A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/10—Commutator motors, e.g. repulsion motors
    • H02P25/14—Universal motors

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

1,250,575. Control of A.C. motor. BELLING & CO. Ltd. 3 June, 1970 [4 June, 1969], No. 28206/69. Heading H2J. A shaded pole induction motor in a ducted air system is supplied with an asymmetrical waveform by means of a diode D in parallel with a resistor R B , for slow speed control. The resistances in the circuit may be variable. When thermostat switch A closes, terminal 1 is connected to either terminal 2, 3 or 4 dependent on the setting of the switch S, in the former two cases the motor receiving a symmetrical supply. When switch A opens, the motor receives an asymmetrical supply via R A . Terminals 5 and 6 are always interconnected. For a heating system, closure of switch A leads to high speed operation, but for cooling, closure of switch A may cause the motor to be connected in a low speed mode of operation. In the heating mode, storage heaters are connected to the supply, and a " summer/winter " changeover switch may be provided to reverse the function of switch A as above. A thermostat switch fitted with an accelerator heater may be used in which case it is necessary that the switch A is operated by a relay coil controlled by the thermostat switch.
GB1250575D 1969-06-04 1969-06-04 Expired GB1250575A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2820669 1969-06-04

Publications (1)

Publication Number Publication Date
GB1250575A true GB1250575A (en) 1971-10-20

Family

ID=10271992

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1250575D Expired GB1250575A (en) 1969-06-04 1969-06-04

Country Status (1)

Country Link
GB (1) GB1250575A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees