Battery Charging Device Phase Angle Control
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Solution Overview
Problem
Conventional battery charging devices fail to supply a predetermined charging current and maintain desired battery voltage when the number of revolutions of the alternating-current generator changes, as they fix the energization phase angle regardless of the generator's speed.
Innovation Solution
A battery charging device with a conversion part, a number-of-revolutions acquisition part, and an output control part that uses a table to correct the energization phase angle based on the generator's speed, temperature, and load current, ensuring the charging current is adjusted accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the energization phase angle is fixed in the conventional battery charging device, then the device structure is simple, but the device cannot supply the predetermined charging current and cannot provide the desired battery voltage when the number of revolutions of the alternating-current generator changes
Solution Approach 1:
The energization phase angle is changed dynamically according to the number of revolutions of the alternating-current generator. The output control part determines an energization phase angle that defines timing of energization of the switching element, and controls energization based on this phase angle, allowing the system to adapt to varying generator speeds while maintaining controlled complexity through systematic control logic
Solution Approach 2:
The energization phase angle is changed in response to changes in the number of revolutions of the alternating-current generator. By adjusting this critical parameter based on generator speed, the system maintains optimal charging performance across different operating conditions without requiring complex structural modifications
2Reliability
If the energization phase angle is changed in response to the number of revolutions of the alternating-current generator, then the desired charging current and battery voltage can be supplied, but the control system becomes more complex
Solution Approach 1:
A number-of-revolutions acquisition part acquires the number of revolutions of the alternating-current generator, and this information is fed back to the output control part which determines the appropriate energization phase angle. This feedback mechanism ensures reliable charging current and voltage control while managing system complexity through structured information flow
Solution Approach 2:
The control of energization timing is achieved through electrical control of the switching element based on acquired revolution information, replacing potential mechanical timing mechanisms. This substitution maintains high reliability in charging parameter control while reducing mechanical complexity in the system
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 supplies a predetermined charging current and controls battery voltage by dynamically adjusting the energization phase angle in response to changes in the alternating-current generator's speed, ensuring optimal charging performance.
Implementation Method 1
a conversion part that converts an alternating current output from an alternating-current generator into a direct current by a switching element
Implementation Method 2
a number-of-revolutions acquisition part that acquires a number of revolutions of the alternating-current generator based on a signal responsive to the operation of the alternating-current generator
Data Source
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AI summary
A battery charging device includes a conversion part that converts an alternating current output from an alternating-current generator into a direct current by a switching element and supplies the direct current to a battery; a number-of-revolutions acquisition part that acquires a number of revolutions of the alternating-current generator based on a signal responsive to the operation of the alternating-current generator; and an output control part that determines an energization phase angle that defines a timing of energization of the switching element of the conversion part for supplying a charging current from the alternating-current generator to the battery, and controls energization of the switching element based on the energization phase angle.