H-bridge detection system and detection method

Abstract

The invention discloses an H-bridge detection system and a detection method. The H-bridge detection system and the detection method are characterized in that the H-bridge detection system comprises apulse-generating circuit, a first sampling resistance, a second sampling resistance and a potential comparison circuit; a circuit structure is simple and can achieve the detection of the connection status of the H-bridge; after the pulse-generating circuit generates pulses to enter a power supply negative terminal of a first H-bridge, whether electric potential of the power supply negative terminal of the first H-bridge is consistent with electric potential of a power supply negative terminal of a second H-bridge is detected through the potential comparison circuit to determine the connectionstatus of the first H-bridge and the second H-bridge. The detection method of the connection status of a H-bridge is fast and convenient with accurate detection results.

Description

technical field [0001] The invention relates to the field of motor drive, in particular to a detection system and detection method of an H bridge. Background technique [0002] In the motor drive, an H bridge is used inside the driver chip to drive the motor, two H bridges are required to drive a stepper motor, and one H bridge is required to drive a DC brushed motor. Now in order to increase the driving ability of the H bridge to the motor, two H bridges are connected in parallel to drive the same motor, thereby increasing the driving current and increasing the driving ability of the motor. In this case, due to the signal transmission path The delay caused by the difference will lead to the collusion phenomenon of the two H bridges, so that the two H bridges are not effectively connected in parallel, and the normal parallel application of the H bridge cannot be realized. Therefore, it is necessary to detect whether the two H bridges are connected in parallel, and according ...

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Problems solved by technology

Now in order to increase the driving ability of the H bridge to the motor, two H bridges are connected in parallel to drive the same motor, thereby increasing the driving current and increasing the driving ability of the motor. In this case, due to the signal transmission path The delay caused by the difference will lead to the collusion phenomenon of the two H bridges, so that the two H bridges are not effectively connected in parallel, and the normal parallel application of the H bridge cannot be realized. Therefore, it is necessary to detect whether the two H bridges are connected in parallel, and according to whether the detected Parallel results for further processing

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