JPS58162796U - Capacitor motor control circuit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

Figure 1 is a circuit diagram of a capacitor motor using TRIAC as a semiconductor switching element, Figure 2 is the same circuit diagram of a capacitor motor using SCR (SCR), and Figure 3 is a trigger circuit for a semiconductor switching element according to an embodiment of the present invention. 4 is a waveform diagram of each part. In the figure, M is a motor, 1 and 2 are TRIAC as semiconductor switching elements, and 5 to 8 are the same (SCR. FWD is a forward rotation command signal. , REV is the reverse command signal, FTT
P is a forward rotation trigger signal that also functions as a braking trigger signal;
RTTP is a reverse trigger signal that also acts as a brake trigger signal.

Claims (1)

[Scope of Claim for Utility Model Registration] In a motor circuit in which the main winding and auxiliary winding of a capacitor motor are interchanged with respect to an AC power supply and the motor is rotated in forward and reverse directions, the main winding and the auxiliary winding of the motor are two semiconductor switching elements connected in series with each of the windings between the alternating current power sources for replacement, and one circuit of a circuit for controlling conduction of both the semiconductor switching elements; 2. The trigger circuit includes a timer circuit for setting a certain period from disappearance of either the forward rotation command signal or the reverse rotation command signal supplied from the outside; 2. The forward rotation command is executed within the period set by the timer circuit a circuit for generating a brake signal during a period in which neither the signal nor the reverse command signal is present; a circuit for generating a brake signal for a period in which the forward rotation command signal causes one of the semiconductor switching elements to conduct full-wave conduction; A reversal trigger signal for making the other semiconductor switching element full-wave conductive by a signal, and the forward rotation trigger signal and the reverse rotation trigger signal are output while the brake signal is being generated, and both the semiconductor switching elements Braking to make the element half-wave conductive! A capacitor motor, comprising: a logic circuit for generating a trigger signal; and the motor is rotated in forward and reverse directions by the forward and reverse trigger signals, and DC braking is applied to the motor by the braking trigger signal. control circuit.