Passenger Conveyor Power Supply Circuit with Storage Battery
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Solution Overview
Problem
Existing passenger conveyor systems face challenges in saving standby electric power during a stopped state without increasing the waiting time until operation resumes, as they either continue powering non-essential devices or require recharging of electrolytic capacitors.
Innovation Solution
A power supply circuit configuration that includes a capacitor for smoothing DC power and a storage battery in parallel, allowing the system to shut off power to non-essential devices and utilize stored DC power from the battery to resume operation quickly when needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the power supply to the control power supply device is shut off during stopped state, then standby electric power is saved, but the electrolytic capacitor is discharged and requires recharging, increasing waiting time until operation resumes
Solution Approach 1:
The storage battery is charged in advance during operation periods so that it can provide power during stopped states. The charging circuit charges the storage battery from the DC electric power generated by the converter, ensuring the battery is ready to supply power when needed, thus avoiding both continuous power consumption and recharging delays
Solution Approach 2:
The storage battery acts as an intermediary energy storage device between the converter and inverter. It decouples the power supply system from the inverter during stopped states, allowing the control power supply device to be shut off while the battery maintains the DC link voltage, preventing both energy waste and operational delays
2Loss of time
If the power supply to the control power supply device is maintained during stopped state, then the electrolytic capacitor remains charged and operation can resume immediately, but standby electric power is consumed by non-essential devices
Solution Approach 1:
The storage battery is charged in advance during operation periods so that it can provide power during stopped states. The charging circuit charges the storage battery from the DC electric power generated by the converter, ensuring the battery is ready to supply power when needed, thus avoiding both continuous power consumption and recharging delays
Solution Approach 2:
The power supply system is segmented into essential and non-essential components. The control power supply device (non-essential) can be shut off during stopped states, while the storage battery maintains power to the inverter and essential systems, enabling selective power management that reduces standby consumption without affecting operational readiness
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient saving of standby electric power during a stopped state without increasing waiting time for resumption, reducing the need for recharging and optimizing operational efficiency.
Implementation Method 1
a converter (2) configured to convert an AC electric power supplied from an AC power supply (1) into a DC electric power
Implementation Method 2
an inverter (3) configured to reconvert the DC electric power into an AC electric power
Implementation Method 3
a capacitor (5) disposed between the converter (2) and the inverter (3) and configured to smoothen the DC electric power output from the converter (2)
Implementation Method 4
a storage battery (7) is disposed between the converter (2) and the inverter (3) in parallel with the capacitor (5)
Data Source
AI summary
A power supply circuit of a passenger conveyor converts includes an electrolytic capacitor and a control power supply device configured to supply an electric power to a charging circuit configured to charge the electrolytic capacitor. A storage battery is disposed between a converter and an inverter in parallel with the electrolytic capacitor. When an operation of the passenger conveyor is stopped in response to a key operation, the power supply to the control power supply device is shut off. When the operation of the passenger conveyor is resumed in response to a key operation, a DC electric power charged in the storage battery is supplied to the inverter, to thereby allow the passenger conveyor to resume the operation.