CN2492935Y - Low-voltage inductive electric appliance with capacitve compensation - Google Patents

Abstract

A low-voltage inductive electrical appliance with capacitive compensation. It connects capacitors in parallel on the coil winding of the existing low-voltage inductive electrical appliance. Based on the principle of resonant circuit, it supplies reactive power to inductive loads as capacitive compensation for inductive loads; to reduce power transmission The reactive current of the line can reduce the power loss and increase the voltage of the load terminal to improve the power factor; because it is a compensation that follows the load, it can reduce the overcompensation and transient phenomena of the power grid to improve the power supply quality of the power grid and reduce It is an expensive facility for reactive power compensators and reactive power compensation control devices in the power grid to improve the economy of electricity consumption; it is suitable for controlling transformers and electromagnet windings to reduce consumption.

Description

Low-voltage inductive appliances with capacitive compensation

The utility model belongs to the energy-saving technology of low-voltage electrical appliances, in particular adding capacitors to low-voltage electrical appliances with coils.

With the continuous demand generated, the low-voltage inductive electrical appliances are also increasing. As we all know, inductive loads need to draw inductive reactive current from the power grid during operation to supply their iron core windings to establish a magnetic field, so that the voltage of the grid is reduced. The increase of power loss hinders the output of active power. At present, in order to reduce power loss and improve power factor, power capacitors are installed on grid equipment as reactive power compensation to reduce power loss and improve power economy. And overcompensation is harmful. Although this kind of compensation has improved the loss, it has not solved the fundamental problem; reactive power compensation should change with the change of inductive load. An undesirable transient phenomenon. Therefore, people have added a variety of reactive power compensators and reactive power compensation control devices in substations and power grid systems to reduce transient phenomena. At present, for the economical power consumption of single-phase asynchronous motors, starting capacitors are usually equipped at the factory, and some are equipped with running capacitors to improve the starting performance and operating performance of (inductive load) single-phase asynchronous motors. However, because the power of low-voltage electrical appliances is relatively small, and people's lack of understanding of energy saving and consumption reduction in the past; thus forming the habit of not having capacitive compensation (capacitors); however, the operation of inductive electrical appliances must absorb reactive current to reduce the voltage. , the increase in power loss hinders the output of active power; at the same time, it will also cause problems such as transient phenomena that people do not want due to the peak and valley of power consumption generated by the production needs of the factory.

The purpose of this utility model is to provide a low-voltage inductive electrical appliance with capacitive compensation. In addition to the functions of the existing low-voltage inductive electrical appliances, it can also reduce the reactive current of the transmission line, reduce losses, and increase the voltage at the load end. Improve power factor and reduce transient phenomenon.

In order to achieve the above object, the utility model adds a capacitor as capacitive compensation on the low-voltage inductive electrical appliance; it is on the coil winding of the low-voltage inductive electrical appliance (on the spiral inductor that the wire is wound into) and connects an appropriate capacitor in parallel, Based on the principle of resonant circuit, the reactive power of the inductive load is supplied to reduce the reactive current in the transmission line, to reduce the line voltage drop, to reduce the power loss, and to improve the economy of power consumption.

Because it is a kind of compensation that follows the load, it can reduce the overcompensation and transient phenomena of the power grid, reduce the reactive current of the transmission line, and reduce the cost of expensive reactive power compensators and reactive power compensation control devices in the power grid. Compensation facilities, reduce loss and increase the output of inductive load electrical appliances.

Below in conjunction with accompanying drawing embodiment the utility model is further described:

Fig. 1: is the schematic diagram of the utility model embodiment.

Fig. 2: is the schematic diagram of another embodiment of the utility model.

In the figure, 1 coil winding, 2 iron core, 3 capacitor, 4 armature.

Find out from Fig. 1: it is that the utility model is used for low-voltage transformer embodiment; Capacitor (3) it is connected in parallel, is wound on the coil winding (1) on the iron core (2), with resonant circuit principle , (the principle of resonant circuit has been generally clarified in a variety of reactive power compensators) to supply the reactive power of the circuit to reduce the reactive current in the transmission line and reduce the power loss; this technology is especially suitable for low-voltage control transformers Energy saving.

Find out in Fig. 2: it is the embodiment that the utility model is used for electromagnet coil winding; Coil (excitation) winding (1) is wound on the iron core (2); Finally, the magnetic flux (φ) generated by the current passes through the iron core (2) and the armature (4) to form a closed loop, so that the iron core and the armature generate different polarities (Z) (S) to attract; and the capacitor (3) is Connected in parallel to the coil winding (1); when the electromagnet coil winding is running, the reactive power of the circuit is supplied by the capacitor as capacitive compensation for the inductive load; to reduce the reactive current of the transmission line, reduce the loss, and make the The voltage at the load terminal increases to improve the power factor; because it is a compensation that follows the load, it can reduce the overcompensation and transient phenomena of the power grid, thereby improving the power supply quality of the power grid and reducing reactive power compensators and reactive power in the power grid. The expensive facilities of the power compensation control device improve the economy of electricity consumption; this embodiment is suitable for reducing the consumption of various electromagnet coil windings such as horseshoe type, clap type, solenoid type, etc.

Claims (1)

1. A low-voltage inductive electrical appliance with capacitive compensation, which is a low-voltage inductive electrical appliance composed of a winding (1), an iron core (2) and an armature (4), and is characterized in that: the winding (1) is connected in parallel with capacitor (3).

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