dcdc converter for car
A converter and conductive path technology, applied in the field of DCDC converters, which can solve problems such as inability to process, inability to set duty cycle, etc.
Active Publication Date: 2021-03-26
AUTONETWORKS TECH LTD +2
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Problems solved by technology
[0004] However, the PWM signal generation device of Patent Document 1 is not a device that assumes a specific range longer than the period of the PWM signal as a non-setting range of the duty ratio (for example, the specific range is an unusable range where the duty ratio cannot be set. range of such devices)
Therefore, in the PWM signal generating device of Patent Document 1, in a situation where the duty ratio calculated by the feedback calculation is within a specific range (duty ratio non-setting range longer than the period of the PWM signal), it is impossible to take appropriate action
Method used
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Embodiment 1
[0043] Next, Example 1 obtained by embodying the present invention will be described.
[0044] figure 1 The vehicle-mounted power supply system 100 shown includes a vehicle-mounted DCDC converter 1 (hereinafter also referred to as a DCDC converter 1), a first power supply unit 101, and a second power supply unit 102, and is configured to be capable of supplying loads 111, 112 and other vehicle-mounted power supplies. A system that supplies power to a load.
[0045] The DCDC converter 1 is constituted, for example, as an on-vehicle buck-boost type DCDC converter, and is formed to boost or step down a DC voltage applied to one of the first conductive path 91 and the second conductive path 92 and output it to the The structure of the conductive path on the other side.
[0046] The DCDC converter 1 includes a first conduction path 91 and a second conduction path 92 as lines of electric power. The first conductive path 91 is a wiring that is electrically connected to the high-po...
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The present invention provides an on-vehicle DC-DC converter that appropriately adopts a duty ratio outside the specific range while suppressing deviation from the calculation result when the calculated duty ratio calculated by the feedback calculation is within a specific range. duty cycle. When the calculated duty ratio calculated by the feedback calculation is within the range to be corrected, the calculation unit of the DCDC converter sets either a predetermined lower limit value or a predetermined upper limit value as a substitute value, and based on this Surrogate value to determine the duty cycle to use. Then, the computing unit updates the accumulated value so as to accumulate a value corresponding to a difference between the used duty determined based on the substitute value and the calculated duty every time the calculated duty in the correction target range is calculated. Then, when a predetermined condition is satisfied, the use duty is corrected by adding or subtracting a part or all of the accumulated value, and the accumulated value is updated by subtracting the corrected value for the use duty.
Description
technical field [0001] The present invention relates to a DC-DC converter for vehicles. Background technique [0002] Patent Document 1 discloses an example of a PWM signal generating device. The purpose of this PWM signal generating device is to double the resolution of the PWM signal and output it with a simple circuit without setting the frequency of the reference clock to double. Specifically, the PWM signal generation device includes a first PWM output control circuit that outputs a PWM signal in response to a rising clock signal of a clock signal, a second PWM output control circuit that outputs a PWM signal in response to a falling clock signal of a clock signal, and switches these A switching circuit that controls the output of the circuit. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2012-227692 [0004] However, the PWM signal generation device of Patent Document 1 is not a device that assumes a specific range longer than the period of the PWM signa...
Claims
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IPC IPC(8): H02M3/158
CPCH02M3/1584B60L1/00B60L1/02B60L1/14B60L2210/10B60L2240/547B60L2240/549B60L50/60B60L58/12B60L58/18H02M3/1582H02M1/0003H02M1/0009Y02T10/70Y02T10/72B60L2210/12H02M1/08H02M3/157
Inventor 薮田宗克长谷川刚史
Owner AUTONETWORKS TECH LTD