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Induction heating device, electric power converting circuit and electric power processing device

An induction heating device and power conversion technology, applied in induction heating, induction current source, motor generator control, etc., can solve the problems of high cost, large size, expensive power supply circuit, etc., and achieve low cost and miniaturization The effect of costing

Inactive Publication Date: 2012-08-29
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the case of using a converter, an expensive power supply circuit and complicated control are required
Therefore, as a control device for an elevator, there are problems such as an increase in size and an increase in cost.

Method used

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  • Induction heating device, electric power converting circuit and electric power processing device
  • Induction heating device, electric power converting circuit and electric power processing device
  • Induction heating device, electric power converting circuit and electric power processing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0035] figure 1It is a block diagram showing a main circuit configuration of an induction heating device, a power conversion device, and an elevator control device including a power processing device using them according to Embodiment 1 of the present invention. In this embodiment, the control device includes: a converter 1 composed of a rectifier diode bridge for converting three-phase AC power sources R, S, T into DC; the capacitor 2 connected in parallel to the capacitor 2 and convert the DC voltage into an AC voltage and supply it to the motor drive inverter 3 (power conversion device for motor drive) for the motor 4; Motor 4 (induction motor); reduction gear 5 for transmitting the rotation of motor 4; drive pulley 6 driven by reduction gear 5; counterweight 7 and elevator car 8 connected to drive pulley 6; The induction heating device 9 connected in parallel with the capacitor 2; the voltage detection circuit 10 for detecting the voltage across the capacitor 2 for power...

Embodiment approach 2

[0087] Figure 15 It is a block diagram showing an induction heating device, a power conversion circuit, and a main circuit configuration of an elevator control device using a power processing device according to Embodiment 2 of the present invention. In Embodiment 2, the control device includes: a converter 1 composed of a rectifier diode bridge for converting three-phase AC power sources R, S, and T into DC; The capacitor 2 used; the motor drive power converter 53 connected to the capacitor 2 in parallel and converting the DC voltage into the power required to drive the motor and providing it to the motor; the motor (DC motor) connected to the output of the power converter 53 54; the reduction gear 5 used to transmit the rotation of the motor 54; the drive pulley 6 driven by the reduction gear 5; the counterweight 7 and the elevator car 8 connected to the drive pulley 6; connected in parallel to the capacitor 2 for power smoothing The induction heating device 9; the voltage...

Embodiment approach 3

[0095] As described above, the regenerative power processing device can be downsized by using the induction heating device. Such an induction heating device can be used not only as a regenerative power processing device for a motor, but also to consume surplus energy stored in elements such as inductors and capacitors in a power converter that is not supplied to a load but is consumed as heat. energy situation. In Embodiment 3, the induction heating device is used to consume the input power, and the power input to the induction heating circuit is accumulated in the power conversion circuit or a load connected to the power conversion circuit in the form of a magnetic field or an electric field. , and not consumed by the load or generated by the load but not consumed by the load.

[0096] As an example in which the above-mentioned surplus energy is not supplied to the load 70 but consumed as heat, in Figure 19 A block diagram showing a circuit configuration of a general outpu...

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PUM

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Abstract

An electric power processing device is provided with an induction heating device (9) that is comprised of an induction heater driving inverter (16) with which an electric power source rectifying capacitor (2) connected in parallel with inverter (3) to drive a motor (4) is connected in parallel, and a resonance circuit (17) provided with an induction heater (18) that is connected with the inverter(16); a comparator (12) that detects a voltage of the electric power source rectifying capacitor (2) and compares the voltage with a reference voltage (11); a switching waveform determining circuit (13) that determines a switching waveform in response to an output of the comparator (12); and a switching element drive circuit (14) that drives a switching element of the inverter (16) in response toan output of the switching waveform determining circuit (13).

Description

technical field [0001] The present invention relates to an induction heating device, a power conversion circuit, and a power processing device, and more particularly, to an induction heating device, a power conversion circuit, and a power processing device for processing regenerative power and the like during a regenerative operation of a motor. Background technique [0002] Generally, in driving a motor, electric power is supplied from a power source to the motor via a power converter such as an inverter, and conversely, electric power is transmitted from the motor to the power source side. The latter is called a power regeneration operation, and the power generated during the power regeneration operation is called regenerative power. Hereinafter, this power regeneration operation will be described by taking an elevator as an example. [0003] Figure 14 It is a block diagram showing the configuration of such a conventional AC elevator control device. The control device i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P3/18H02P27/06
CPCH05B6/04H02M5/42H02M1/322
Inventor 泉喜久夫松本贞行菅郁朗中尾一成
Owner MITSUBISHI ELECTRIC CORP