JPH01218362A - Rectifier - Google Patents

Abstract

PURPOSE:To reduce the cost, size and weight of a rectifier by altering the construction of the rectifier into a full-wave rectifier and a double voltage rectifier with a converter. CONSTITUTION:A switch 9 is provided in a rectifier, and the connecting points of diodes 4-5 and the connecting point of capacitors 6-7 are switched and connected to an AC input terminal 1. The AC voltage of the terminal .. is rectified by a double voltage rectifier composed of thyristors 2-3, the capacitors 6-7, and a DC voltage of double voltages of the peak value of the AC input is supplied to a load 8. A controller 10 monitors a load voltage, and controls the igniting angles of the thyristors 2-3, thereby controlling a DC voltage value. Further, when the AC voltage of the double effective value of the AC voltage is applied to the terminal 1, the switch 9 is switched, a full-wave rectifier is composed of the thyristors 2-3, the diodes 4-5 to supply power to the load 8.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a rectifier.

Conventional technology Conventionally, in a rectifier that rectifies an AC voltage to obtain a DC voltage, a constant DC voltage is output from two types of AC voltage: an AC voltage with a certain effective value and an AC voltage with twice the effective value. A rectifier that uses a transformer at the input of the rectifier circuit, and even if the effective value of the AC voltage changes, the input voltage to the rectifier circuit remains constant by switching the taps of the transformer.
Or, a full-wave rectifier circuit and a voltage doubler rectifier circuit are provided in the rectifier, and the full-wave rectifier circuit and the voltage doubler rectifier circuit are used depending on the input AC voltage0 Problems to be Solved by the Invention Therefore In the former case, a transformer is required at the input.
The latter has disadvantages in that the device becomes large and heavy, and the rectification circuit becomes complicated and expensive.

The present invention aims to eliminate the above-mentioned drawbacks, and aims to provide a rectifier that is inexpensive, small, and lightweight and can be used both as a full-wave rectifier circuit and as a power doubler rectifier circuit.

Means for Solving the Problems The present invention has been made to achieve the above objects.
By changing the connection of the rectifier circuit using a switching device, it is possible to use it as a full-wave rectifier circuit or a voltage doubler rectifier circuit.

Operation The present invention has the above-mentioned characteristics, and by operating the switching device, the connection of the rectifier circuit is changed and it can be used as either a full-wave rectifier circuit or a voltage doubler rectifier circuit.

Example An embodiment of the present invention will be described.

The drawing is a block circuit diagram showing one embodiment of the present invention.
The AC voltage applied to AC input terminal 1 is applied to thyristor 2.
Thyristor 3. It is rectified by a voltage doubler rectifier circuit constituted by a capacitor 6 and a capacitor 7, and can supply a DC voltage twice the peak value of the AC input to the load 8. The control circuit 10 constantly monitors the load voltage and controls the thyristor 2. By controlling the firing angle of the thyristor 30, the DC voltage value is controlled. AC input terminal 1
When applying an AC voltage with an effective value twice the AC voltage to the thyristor 2., switch 9 is changed and the connection shown by the broken line is made to connect the thyristor 2. Thyristor 3. Diode 4. The diode 5 constitutes a full-wave rectifier circuit, the capacitor 6 and the capacitor 7 remove the ripple voltage, and supply it to the load 8. Since the control circuit 10 monitors the load voltage and controls the firing angle of the thyristor, it outputs the same DC voltage as the DC voltage value output by the voltage doubler rectifier circuit.

Effects of the Invention As described above, according to the present invention, since the configuration of the rectifier circuit is changed using a switching device, it is possible to create a rectifier that can use both a full-wave rectifier circuit and a voltage doubler rectifier circuit with a small number of parts. It can be configured, inexpensive, small, and lightweight.

[Brief explanation of the drawing]

The drawing is a block circuit diagram showing one embodiment of the present invention. 1 is an AC power supply, 2 and 3 are thyristors, 4 and 5 are diodes, 6 and 7 are capacitors, 8 is a load, 9 is a switch, 1
0 is a control circuit.

Claims (1)

[Claims] A rectifier characterized in that the configuration of the rectifier circuit is changed by a switching device so that it can be used as both a full-wave rectifier circuit and a voltage doubler rectifier circuit.