Delta Electronics has been granted a patent for a power converter and control method. The converter includes primary and secondary side switching circuits, a transformer, and a control circuit. The control circuit enables and disables the switches in alternating durations to control power transfer. GlobalData’s report on Delta Electronics gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Delta Electronics, Battery management systems was a key innovation area identified from patents. Delta Electronics's grant share as of September 2023 was 66%. Grant share is based on the ratio of number of grants to total number of patents.
Power converter with alternating enabling and disabling of switches
A recently granted patent (Publication Number: US11777417B2) describes a power converter that includes a primary side switching circuit, a secondary side switching circuit, a transformer, and a control circuit. The control circuit is responsible for controlling the power transfer between the primary and secondary side switching circuits by controlling the sets of switches. The control circuit enables and disables the switches in alternating durations.
In the enabling duration, the first and second sets of switches are enabled to operate with approximately 50% duty cycle. The time of the enabling and disabling durations is a multiple of the switching period of the switches. A counter is included in the power converter to record time, and the control circuit controls the switches based on the recorded time.
The time of the enabling duration is determined by factors such as the maximum magnetizing current and differences in uneven duty-cycles of the switches. The power converter can be a resonant converter, which includes a resonant tank with a resonant capacitor and a resonant inductor connected in series. It can also be a dual active bridge converter with an inductor coupled between the primary side switching circuit and the transformer.
The power converter described in the patent can be used as a unidirectional or bidirectional isolated DC-DC converter. It can also be a multi-phase isolated DC-DC converter. The control method implemented by the control circuit can be sensor-less, meaning it does not require external sensors for operation. Additionally, the control method is designed to prevent saturation of the transformer.
Overall, this patent describes a power converter with a control circuit that enables and disables sets of switches to control power transfer. The converter can be used in various applications, including resonant converters, dual active bridge converters, and isolated DC-DC converters. The control method implemented by the control circuit can be sensor-less and prevents transformer saturation.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
