Positioning Control Device Regenerative Power Optimization
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Solution Overview
Problem
Conventional positioning control systems do not effectively utilize regenerative power produced during motor deceleration, leading to insufficient reduction in power consumption during positioning operations.
Innovation Solution
A positioning control device that includes a converter, smoothing capacitor, regenerative resistance, and regenerative transistor, along with a command generation unit that estimates regenerative power and adjusts positioning command values based on the comparison between estimated regenerative power and storable energy, to optimize motor operations and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional positioning control is used without considering regenerative power, then the control system is simple, but power consumption is high due to insufficient utilization of regenerative energy
Solution Approach 1:
The control system calculates regenerative power amount based on command velocity and command acceleration patterns, then feeds this information back to determine the optimal positioning command value. This feedback mechanism enables the system to utilize regenerative energy effectively while maintaining reasonable control complexity.
Solution Approach 2:
The system performs preliminary calculation of regenerative power amount before executing the positioning operation. By calculating the expected regenerative power based on the command pattern in advance, the system can select the optimal positioning command value that maximizes energy recovery without adding complex real-time control mechanisms.
2Use of energy by moving object
If positioning command value is adjusted to reduce power consumption, then energy efficiency improves, but positioning time may increase
Solution Approach 1:
The system changes the parameters of the positioning command value based on the calculated regenerative power amount. When regenerative power is sufficient, the system selects positioning commands that optimize energy recovery; when regenerative power is insufficient, it adjusts parameters to maintain acceptable positioning time, thus balancing energy efficiency and time requirements.
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
The device effectively reduces power consumption by efficiently utilizing regenerative power, minimizing energy loss, and optimizing motor operations during positioning tasks.
Implementation Method 1
a smoothing capacitor to smooth an output of the converter and to generate a bus voltage
Implementation Method 2
a regenerative resistance and a regenerative transistor that are connected between the bus-bars
Data Source
AI summary
A positioning control device according to an embodiment includes an amplifier that includes a converter that rectifies and outputs an AC power supply to bus-bars; a smoothing capacitor that smoothes an output of the converter and generates a bus voltage; a regenerative resistance and a regenerative transistor; an inverter that supplies a drive current; and a command generation unit that generates a position command value for positioning control of a mechanical load in accordance with a command pattern. The inverter is connected between the bus-bars and supplies the drive current. The command generation unit acquires a regenerative-power-amount estimated value and an energy value storable in the smoothing capacitor; and on the basis of a result of a comparison between these values, it decides whether to use the position command value on the basis of the command pattern.