JPS6223367A - Semiconductor power regulator - Google Patents

Abstract

PURPOSE:To shape output waveforms on light load, by connecting a series and parallel unit of diodes, resistances and condensers between the output terminals. CONSTITUTION:On the output side of a power regulating circuit using a semiconductor, the parallel connection circuit of diodes D1, D2 and resistances R2, R3 is connected to the series connection circuit of condensers C1, C2 in parallel with each other, and the circuits are provided with a circuit connected to a resistance R1 in series. By the diodes D1-D2, the resistances R1-R3, and the condensers C1-C2, a counter-electromotive force generated on a load is absorbed, and output waveforms are shaped on light load. Accordingly, power can be regulated according to a resistance load, an inductance load, and the variation of a load.

Description

[Detailed Description of the Invention] This invention connects a circuit in which a diode, a resistor, and a capacitor are combined in series and parallel to the output side of a power adjustment circuit using a semiconductor to absorb back electromotive force generated from a load. This invention relates to a semiconductor power regulator that simultaneously shapes the output waveform generated during light loads.

Conventional semiconductor power regulators have no problem with output when the load is resistive, but when the load is inductive or
In other words, in the case of coils, motors, etc., the phase of the current is delayed, so even if the voltage E is reversed as shown in Figure 2, the current I
The current flows, the current decreases, and the semiconductor switch turns off. At the same time, back electromotive force Po is generated, so back electromotive force Pa
There is a drawback that even if you measure it with a wattmeter, the actual power will show up as a large value, and when the load is light, there is a problem like the third factor.

The current I decreases when the voltage E is not reversed, and the semiconductor switch is turned off, resulting in a disadvantage that the average output voltage is lower than the intended value.

In order to eliminate this drawback, the present invention has developed a diode DI and a resistor R1H, which are surrounded by dotted lines in the circuit diagram of FIG.
Rt + capacitor CI and reverse direction, resistor Rl
+' Capacitor C0 and diode D11 resistor R,:
By changing the value of I capacitor CI, the forward and reverse charging time can be adjusted by changing the resistance R1, R, capacitor Cr and rf resistor R,
,R,, the forward and reverse discharge time is changed by the capacitor C, so that the back electromotive force PO, which is the second cause, becomes Pl, and when the load is light, the current r is made to flow until immediately after the voltage E is reversed. By adjusting the values until they reached their respective best values, it was possible to simultaneously eliminate the two drawbacks of counter electromotive force and light load by using only the circuits in this set.

As a result, it has become possible to adjust the power in response to changes in load, such as resistive load, inductive load, and whether the load is high or low.

[Brief explanation of drawings]

Figure 1 is a circuit diagram. Figure 2 is a waveform diagram when inductance is loaded. @Figure 3 is a waveform diagram at light load.

Claims (1)

[Claims] A semiconductor power regulator that connects a circuit with a series-parallel diode, resistor, and capacitor to the output side to absorb back electromotive force from the load and at the same time shapes the output waveform during light loads.