NC Lathe Power Saving Calculation from Device Energization States
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Solution Overview
Problem
Existing machine tools lack an accurate and easy method to calculate power saving by shutting off energization of electric devices, as operations without and with shut-off are not executed under identical conditions, complicating the measurement process.
Innovation Solution
A machine tool with an energization signal switching unit, prohibition signal switching unit, signal determination unit, and saving calculation unit to determine and compute device-specific power saving based on cumulative duration, allowing for accurate and easy power saving calculation without requiring energization shut-off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the machine tool is operated without shutting off energization to measure power consumption, then the measurement can be performed, but the operation becomes complicated and the conditions are not identical
Solution Approach 1:
The patent creates a virtual model of power consumption by accumulating power consumption data during periods when energization is prohibited. This copy of the power consumption characteristics allows calculation without actually shutting off energization during measurement, thereby maintaining identical operating conditions while simplifying the measurement process
Solution Approach 2:
The system accumulates power consumption data in advance during periods when energization is prohibited, storing this information for later use. This preliminary accumulation allows the power saving to be calculated without needing to perform actual shut-off operations during the measurement phase, thus avoiding operational complexity
2Loss of energy
If energization of electric devices is shut off to reduce power consumption, then power saving is achieved, but it becomes impossible to know the actual power saving amount
Solution Approach 1:
The system continuously monitors and accumulates power consumption data during periods when energization is prohibited, providing feedback information that allows the actual power saving to be calculated. This feedback mechanism ensures that while energization is shut off to save power, the information about power consumption is preserved and can be used to determine the actual power saving amount
Solution Approach 2:
The patent introduces an intermediary accumulation process that captures power consumption information during periods when energization is prohibited. This intermediary data storage acts as a bridge, allowing the system to shut off energization for power saving while simultaneously preserving the information needed to calculate the actual power saving amount
3Loss of energy
If the machine tool operates in ECO mode with energization prohibition, then power consumption is reduced, but the calculation of power saving becomes complex requiring comparison with normal mode operations
Solution Approach 1:
The system creates a virtual representation of power consumption characteristics by accumulating data during ECO mode operations. This copied information allows the power saving to be calculated directly from the accumulated data without needing to perform actual normal mode operations for comparison, thereby reducing calculation system complexity
Solution Approach 2:
The system performs self-service by accumulating its own power consumption data during ECO mode operations and using this self-collected information to calculate power saving. This eliminates the need for external comparison operations with normal mode, simplifying the calculation system while maintaining accurate power saving measurement
Data Source
AI summary
An NC lathe includes an energization signal switching unit for switching an energization signal set for each electric device between an energization required state and an energization non-required state, a prohibition signal switching unit for switching an energization prohibition signal set for each electric device between a prohibited state and a permitted state, a signal determination unit that determines whether or not each electric device is in a power saving state in which the energization signal for the electric device is in the energization required state and the energization prohibition signal is in the prohibited state, and a saving calculation unit that determines a cumulative duration of the power saving state, computes a device-specific power saving for each electric device on the basis of the cumulative duration, and calculates a power saving by adding together the device-specific power savings.