JPS61205298U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 is a control circuit diagram of the washing machine of the present invention;
Figures A to F are main part output waveform diagrams in Figure 1, and Figure 3.
The figure is a block diagram of the control circuit in the conventional example.
The figure is the same control circuit diagram of the washing machine, Figure 5 is the commercial frequency synchronous pulse generation circuit diagram, and Figure 6 is the same as the control circuit diagram of the washing machine.
FIG. 7 is an output waveform diagram of the main part in FIG. 4. 1... Microcomputer, 7, 7a... Commercial frequency synchronous pulse generation circuit (external circuit), 10
...Load power control circuit, 12, 12a...Motor, 13...Solenoid, 14a, 15a, 16
...Bidirectional thyristor.

Claims (1)

[Scope of utility model registration request] A load power control circuit that uses an external load such as a motor or a solenoid, a bidirectional thyristor to control the operation of this load, and a gate signal of the bidirectional thyristor that is synchronized with the zero-crossing point of the commercial power frequency. an external circuit that generates pulses to control the load power control circuit, a microcomputer that controls the operation of the load power control circuit, a power transformer, and a a constant voltage circuit, the secondary winding of the power transformer to which the external circuit is connected is provided separately from the secondary winding to which the constant voltage circuit is connected, and the load power control further controls the motor. A washing machine characterized in that an external circuit separate from the external circuit corresponding to the circuit is provided, and the separate external circuit corresponds to a load power control circuit that controls the solenoid.