阅读说明：本技术 乘客输送机 (Passenger conveyor ) 是由 森上敦史 于 2017-06-09 设计创作，主要内容包括：乘客输送机的电源电路在利用换流器将从三相交流电源供给的交流电转换为直流电后,利用逆变器再次将该直流电转换为交流电。电源电路具备：电解电容器,其对从换流器输出的直流电进行平滑化；以及控制电源装置,其向在乘客输送机停止时对电容器充电的充电电路进行电力供给。此外,在换流器与逆变器之间,与电解电容器并联地设置有电解电容器。在通过按键操作已使乘客输送机的运转停止的情况下向控制电源装置的电力供给被切断并通过按键操作要使乘客输送机的运转重新开始时,向逆变器供给蓄电装置中充入的直流电,由此使乘客输送机的运转重新开始。(A power supply circuit of a passenger conveyor converts ac power supplied from a three-phase ac power supply into dc power by an inverter, and then converts the dc power into ac power again by an inverter. The power supply circuit includes: an electrolytic capacitor for smoothing the direct current output from the inverter; and a control power supply device that supplies power to a charging circuit that charges the capacitor when the passenger conveyor is stopped. Further, an electrolytic capacitor is provided between the converter and the inverter in parallel with the electrolytic capacitor. When the operation of the passenger conveyor is to be restarted by a key operation while the power supply to the control power supply device is cut off by the key operation, the dc power charged in the power storage device is supplied to the inverter, thereby restarting the operation of the passenger conveyor.)

1. A passenger conveyor having a power supply circuit that converts alternating current supplied from an alternating current power supply into direct current by an inverter and then converts the direct current into alternating current again by an inverter, the passenger conveyor comprising:

a capacitor provided between the converter and the inverter, and smoothing the direct current output from the converter; and

a control power supply device that supplies power to a charging circuit that charges the capacitor when the passenger conveyor is stopped,

an electrical storage device is provided in parallel with the capacitor between the converter and the inverter,

cutting off the power supply from the AC power supply to the control power supply device when the operation of the passenger conveyor is stopped by a key operation,

when the operation of the passenger conveyor is to be restarted by a key operation, the dc power charged in the power storage device is supplied to the inverter, thereby restarting the operation of the passenger conveyor.

2. The passenger conveyor according to claim 1,

when the operation of the passenger conveyor is stopped by a key operation, the connection between the capacitor and the power storage device and the inverter is cut off.

3. The passenger conveyor according to claim 1 or 2,

during operation of the passenger conveyor, the capacitor and the power storage device are charged from the inverter.

4. The passenger conveyor according to any one of claims 1 to 3,

when the passenger conveyor is maintained, the supply of electric power from the ac power supply to the inverter and the control power supply device is cut off.

5. The passenger conveyor according to claim 4,

when the passenger conveyor is maintained, the connection between the capacitor and the electrical storage device and the inverter is cut off.

Technical Field

The present invention relates to a passenger conveyor, and more particularly to a passenger conveyor including a power supply circuit that converts ac power supplied from a power supply into dc power by an inverter and then converts the dc power into ac power again by an inverter.

Background

Some conventional passenger conveyors include a control power supply device for supplying electric power to a charging circuit for charging a smoothing electrolytic capacitor provided between a converter and an inverter and various electric devices (for example, patent document 1). The control power supply device supplies power to a charging circuit of an electrolytic capacitor even when the operation of a passenger conveyor is stopped by a key operation of a user, so as to prevent damage of the electrolytic capacitor caused by surge current when the operation is restarted. However, the control power supply circuit also supplies power to other electrical devices that cannot be used during the operation stop.

In order to reduce the standby power when the operation is stopped by the key operation, it is conceivable to cut off the power supply to the control power supply device, but in this case, the electrolytic capacitor is discharged and needs to be recharged when the operation is restarted, and therefore, the waiting time for restarting the operation becomes long.

Disclosure of Invention

Problems to be solved by the invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a passenger conveyor capable of reducing standby power when an operation is stopped by a key operation without extending a waiting time for restarting the operation.

Means for solving the problems

In order to solve the above problem, a passenger conveyor according to the present invention includes a power supply circuit that converts ac power supplied from an ac power supply into dc power by an inverter and then converts the dc power into ac power again by an inverter, the passenger conveyor including: a capacitor provided between the converter and the inverter, for smoothing the direct current output from the converter; and a control power supply device that supplies power to a charging circuit that charges the capacitor when the passenger conveyor is stopped, wherein a power storage device is provided in parallel with the capacitor between the converter and the inverter, and when the operation of the passenger conveyor is stopped by a key operation, the power supply from the ac power supply to the control power supply device is cut off, and when the operation of the passenger conveyor is to be restarted by a key operation, the dc power charged in the power storage device is supplied to the inverter, thereby restarting the operation of the passenger conveyor.

Effects of the invention

According to the passenger conveyor of the present invention, the standby power for stopping the operation by the key operation can be reduced without extending the waiting time for restarting the operation.

Drawings

Fig. 1 is a diagram showing a configuration of a power supply circuit of a passenger conveyor of the embodiment.

Fig. 2 is a diagram showing on/off states of the relays a to D in 7 operating states of the passenger conveyor according to the embodiment.

Fig. 3 is a diagram showing states (charge, discharge, and maintenance) of the electrolytic capacitor and the power storage device in 7 operating states of the passenger conveyor according to the embodiment.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to fig. 1 to 3. However, the embodiments described below are merely examples, and the present invention is not limited to these embodiments.