Electronic control circuitry with start up capability

摘要

Certain configurations of the present disclosure present a PTC starter. The PTC starter includes a housing, a first conductive terminal (6), a second conductive terminal (7), a control PTC thermistor (3), a start PTC thermistor (4) and a TRIAC (5), wherein the control PTC thermistor (3), the start PTC thermistor (4) and the TRIAC (5) being accommodated in the housing, the start PTC thermistor (4) being connected in series with the TRIAC (5), wherein one electrode of the control PTC thermistor (3) is connected with the gate (G) of the TRIAC (5), the control PTC thermistor (3) is connected in series with the start PTC thermistor (4), the volume of the control PTC thermistor (3) is less than 30 mm3, and the distance between the control PTC thermistor (3) and the start PTC thermistor (4) is less than 5 mm.

主权项

1. A PTC starter, apparatus to deliver input current to a motor winding, the PTC starter apparatus comprising:
a housing; a control PTC thermistor; a start PTC thermistor; a TRIAC device; and wherein the control PTC thermistor, the start PTC thermistor and the TRIAC are disposed in the housing, the start PTC thermistor being connected in series with the TRIAC device, the input current flowing through the start PTC thermistor and the TRIAC device to the motor winding, wherein a first electrode of the control PTC thermistor is connected to a gate (G) of the TRIAC device, and wherein a second electrode of the control PTC thermistor is connected to an intermediate node electrically connecting the start PTC thermistor and the TRIAC device, the control PTC thermistor operable to convey a control current from the intermediate node to the gate of the TRIAC device to control the input current delivered to the motor winding.