-
公开(公告)号：US3696281A
公开(公告)日：1972-10-03
申请号：US3696281D
申请日：1971-06-02
Applicant: DANFOSS AS
Inventor： GRAMKOW ASGER , HYLDAL JORGEN
IPC: H02P1/44
CPC classification number: H02P1/44
Abstract: The invention relates to a starting circuit for a single phase asynchronous electric motor having a main winding and a starting winding. The circuit comprises a pair of terminals across which the main winding of the motor is connected and across which in operation an AC current is supplied. Means including a PTC resistor are utilized which provide an AC voltage which decreases in amplitude after the motor start-up. An SCR is connected in series with the starting winding and is controlled by a network to which the decreasing AC voltage is supplied. This network has capacitor means for storing current which is then available to control the SCR during zero cross-overs of the single phase AC current.
Abstract translation: 本发明涉及一种具有主绕组和起动绕组的单相异步电动机起动电路。 该电路包括一对端子，电动机的主绕组连接在该端子上，并且在操作中提供交流电流。 使用包括PTC电阻器的装置，其提供在电动机起动之后振幅减小的AC电压。 SCR与起动绕组串联连接，并由提供降低的交流电压的网络控制。 该网络具有用于存储电流的电容器装置，其随后可用于在单相交流电流的零交叉期间控制SCR。
-
公开(公告)号：US3600656A
公开(公告)日：1971-08-17
申请号：US3600656D
申请日：1970-02-02
Applicant: DANFOSS AS
Inventor： GRAMKOW ASGER
CPC classification number: H02P1/42
Abstract: The invention relates to a starting switch assembly for a single phase asynchronous motor. The assembly includes a symmetrically controlled semiconductor valve in series with the motor starting coil. The control electrode of the valve is connected by way of a PTC resistor to the end of the starting coil which is remote from the valve. In this arrangement the PTC resistor is controlled directly by the power supply voltage and the time required for the PTC resistor to reach the cutout temperature depends substantially only on the characteristics of the PTC resistor and is independent of the particular construction of the motor.
-
公开(公告)号：US3562614A
公开(公告)日：1971-02-09
申请号：US3562614D
申请日：1968-07-10
Applicant: DANFOSS AS
Inventor： GRAMKOW ASGER
CPC classification number: H02P1/42
Abstract: The invention relates to starting switch means for a single phase asynchronous motor having a symmetrical controlled semiconductor valve as a starting switch. The valve and an ohmic resistor is in series with the starting winding of the motor. A PTC resistor is connected to the control electrode of the valve and is arranged parallel to the valve and the ohmic resistor. The starting switching means is enclosed, along with the electric motor, in the housing of a refrigeration unit.
-
-
Search Results
3
records
(took 0.009 seconds)
