Bidirectional dc-dc converter circuit control system and hybrid electric vehicle
A DC-DC, circuit control technology, applied in control/regulation systems, DC power input conversion to DC power output, instruments, etc., can solve problems such as analog control temperature drift, component aging, etc. Device aging problem, good compatibility, and the effect of avoiding temperature drift problem
Inactive Publication Date: 2016-08-31
深圳市佳华利道新技术开发有限公司
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Problems solved by technology
[0005] Circuit control systems using bidirectional DC-DC converters generally use analog control technology, which cannot solve the problem of analog control temperature drift and aging of components
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[0024] Such as figure 1 As shown, the bidirectional DC-DC converter circuit control system in this embodiment includes a bidirectional DC-DC converter, a digital signal controller, a protection circuit, a sampling circuit, an optocoupler isolation circuit, an auxiliary power supply and a CAN transceiver. The bidirectional DC-DC converter is connected to the driving circuit, the protection circuit and the sampling circuit, and the sampling circuit and the protection circuit are connected to the digital signal controller, and the digital signal controller is connected to the driving circuit through the optocoupler isolation circuit. The transceiver is connected on the CAN bus and is signally connected with the digital signal controller.
[0025] The bidirectional DC-DC converter (bidirectional Buck / Boost converter) adopts the Buck-Boost topology, which generally has a high-voltage terminal and a low-voltage terminal, and a first switching tube and a second switching tube are arr...
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The invention discloses a bidirectional DC-DC converter circuit control system and a hybrid motor vehicle, including a bidirectional DC-DC converter, a drive circuit, a sampling circuit, a digital signal controller and a CAN transceiver; the bidirectional DC-DC conversion The device is connected to the signal of the driving circuit and the sampling circuit, and the driving circuit, the sampling circuit and the CAN transceiver are all connected to the signal of the digital signal controller, and the CAN transceiver is connected to the CAN bus; the bidirectional DC-DC converter The topological structure includes a high voltage end and a low voltage end, the sampling circuit samples the current and / or voltage value of the high and low voltage end, the digital signal controller processes the sampled value and controls the bidirectional DC-DC through the driving circuit The converter performs PWM control. Digital control is carried out by sampling digital signal controllers, which avoids the temperature drift of analog control and the aging of components, reduces the design cost of the system, and has better compatibility, flexibility and scalability than analog control.
Description
technical field [0001] The invention relates to a bidirectional DC-DC converter circuit control system and a hybrid motor vehicle. Background technique [0002] Bi-directional DC-DC Converter (Bi-directional DC-DC Converter, referred to as BDC) refers to the two-quadrant operation of BDC. DC converter (DC-DC Converter). In daily life, many key loads require an uninterruptible power supply. In the UPS system, when the power supply (such as mains) is working normally, the battery is charged through the charging unit; Power supply, the charging and discharging unit in the system can be replaced by BDC. In solar battery array systems, BDC is also widely used, especially in aerospace power systems, where energy is mainly provided by battery packs and solar photovoltaic panels. When the sunlight is sufficient, the solar photovoltaic panels will store excess energy in the battery pack through the BDC in addition to providing the normal power consumption of the load; when the sun...
Claims
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IPC IPC(8): H02M3/156
Inventor 刘洋成王军峰
Owner 深圳市佳华利道新技术开发有限公司