JPS60210131A - Flywheel power source - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a flywheel power supply device that compensates for power outages and the like using a flywheel device that rotates at high speed.

(Prior Art) FIG. 1 is a simplified configuration diagram showing an example of a conventional flywheel power supply device. In the figure, F is a power supply main body, and this power supply main body F includes an auxiliary inverter l, a converter 2. It has a changeover switch 3, a main circuit converter 4, and a main circuit inverter 5. R is a flywheel device, and this flywheel device R is composed of a motor/generator section and a flywheel, and is constantly connected to an auxiliary inverter. For example, the output power of the flywheel is 30,000 (r p
m), and in the event of a power outage, the rotational energy of this flywheel is converted into electrical energy and output.

This flywheel power supply device normally supplies constant-voltage, constant-frequency AC power from an external power source 8 to a load 9 via a changeover switch 6 from a main circuit S consisting of a main circuit converter 4 and a main circuit inverter 5. . At this time, the selector switch 3 of the power failure compensation circuit P consisting of the auxiliary inverter 1, the flywheel device R, and the converter 2 is open, and the flywheel built in the flywheel device R receives energy due to the high speed rotation by the auxiliary inverter 1. − is accumulated.

When an abnormality occurs in the external power supply 8 due to a power outage or the like, the changeover switch 3 controlled by the power outage detection means is closed, and the generator generates electricity using the inertial energy of the flywheel of the flywheel device R.

This AC power is converted into DC power by converter 2 and supplied to load 9 via main circuit inverter 5 and changeover switch 6. Note that 7 is a changeover switch for directly connecting external power source 8 to load 9, and when this is on, changeover switch 6 is turned off. These switches 6.7 constitute a switch circuit 67. Such a device can also compensate for drops in the power supply voltage due to fluctuations in the power supply voltage.

However, with such a configuration, the inverter 5 must be designed by paying attention to both the converter 4 side and the converter 2 example, so the design is not easy, and after the switch 3 is turned on, the output of the converter 2 is Even when input to the inverter 5, there is a response delay while this input is converted into an AC waveform with a regular waveform, resulting in fluctuations in the input to the load 9.

The present invention eliminates the above drawbacks by supplying the output of a compensation circuit from a converter to a load via an inverter and a switch, and will be described in detail below using embodiments.

[Embodiments of the invention]

FIG. 2 is a block diagram showing an embodiment of the flywheel power supply device according to the present invention, and the same parts as in FIG. 1 are designated by the same reference numerals.

In this case, the output of the power supply 8 is connected to the primary winding 21a of the transformer 21 via the switch 20.

The secondary winding 21b of the transformer 21 is connected to the direct transmission circuit and also to the converter 4 of the main circuit S, and the output of the converter 4 is connected to a chopper-type DC-DC converter 22, for example, which boosts the DC voltage. It is supplied to the inverter 5 via the filter 23.

The output of the inverter 5 is a switch circuit 67, a switch 24
is supplied to the load 9 via. The tertiary winding 21c of the transformer 21 includes a converter 30 that converts the output from the power source 8 side into direct current, and an auxiliary inverter 31 that converts the output of this converter into a high frequency and rotationally drives the flywheel device R.
It is connected to a drive circuit 25 consisting of.

The output of the flywheel device R is supplied to the load 9 side via a converter 32, a DC-DC converter 33, a DC filter 34, an inverter 35, and a switch 36.

In such a configuration, the output of the power supply 8 is supplied to the load 9 via the main circuit S during normal operation. In this case, since the DC-DC converter 22 is provided, a stable output can be supplied even if the power source 8 is single-phase and its output fluctuates. In steady state, the flywheel device R is rotated at high speed by the high frequency output of the inverter 31, and the output is converted to DC by the converter 32, boosted by the DC/DC conversion circuit 33, and ripples are removed by the DC filter 34. It is converted into alternating current by an inverter 35. Power abnormality switch 3
6 is turned on, this AC output is instantaneously supplied to the load 9 via the switch 24, so that the load 9 is supplied with a stable input. Note that by providing the DC-DC converter 33, even if the output of the flywheel device R gradually decreases, a constant output can be supplied to the load 9 for a certain period of time.

〔Effect of the invention〕

As explained above, according to the present invention, the output of the compensation circuit is supplied from the converter to the load via the inverter and the switch, so when designing the inverter of the main circuit, it is only necessary to focus on the converter of the main circuit. This simplifies the design, and allows the output of a normal current waveform to be instantly supplied to the load when a power supply abnormality occurs.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of a conventional flywheel power supply device, and FIG. 2 is a block diagram showing an embodiment of the flywheel power supply device according to the present invention. L... Direct feed circuit, S... Main circuit, P... Compensation circuit, 4, 30.32... Converter, 5゜31.35.
...Inverter, 22.33...DC-DC converter. Note that the same reference numerals are used for the middle part of the figure or corresponding parts. Agent Masuo Oiwa (and 2 others) Figure 2

Claims (1)

[Claims] A main circuit consisting of a converter that converts the output of the power supply to DC, an inverter that converts the output of this converter to AC and supplies it to the load, and a flywheel that is driven to rotate by the power supply and converts the energy from this rotation into electrical energy. What is claimed is: 1. A flywheel power supply device comprising a compensation circuit consisting of a device, wherein the output of the compensation circuit is supplied from a converter to a load via an inverter and a switch.