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power supply system

A power supply system and resistance technology, applied in transmission systems, digital transmission systems, current collectors, etc., can solve problems such as interference with M-BUS normal communication, communication failures, and M-BUS bus current fluctuations.

Active Publication Date: 2021-03-26
上海云衡科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will cause various uncontrolled current fluctuations on the M-BUS bus, which is equivalent to sending a lot of garbled characters from the slave station, which will interfere with the normal communication of the M-BUS, cause the master station to make wrong judgments, and cause communication failures. So it cannot be used for standard M-BUS communication

Method used

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Embodiment Construction

[0071] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and modifications without departing from the concept of the present invention.

[0072] Such as figure 1 As shown, the power supply system of the present invention includes: M-BUS chip U1, charging switch, constant current source, DC-CD step-down circuit, power supply switch, DC-CD enabling control circuit, VBAT voltage detection circuit, MCU power supply circuit, M-BUS current setting circuit, capacitor C2, capacitor C3 and capacitor C4; where

[0073] The model of M-BUS chip U1 is TSS721;

[0074] The over-resistance R28 of the RIS pin of the M-BUS chip U1 is grounded, the over-resistance R29 of the RX pin of the M-BUS chip U1 is electrically c...

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Abstract

The invention provides a power supply system. The power supply system comprises an M-BUS chip U1, a charging switch, a constant current source, a DC-CD step-down circuit, a power supply switch, a DC-CD enable control circuit, a VBAT voltage detection circuit, an MCU power supply circuit, an M-BUS current setting circuit, a capacitor C2, a capacitor C3 and a capacitor C4. The system has the advantages that: 1) no built-in battery is arranged, the service life is not limited, the transportation is not limited, and secondary installation and verification are not needed; (2) the M-BUS standard iscompletely met, the requirement of a slave station for large current is met, meanwhile, no interference effect is generated on the M-BUS system, and the M-BUS system can be safely connected into the standard M-BUS system.

Description

technical field [0001] The invention belongs to the field of electrical control, in particular to a large current power supply system suitable for M-BUS. Background technique [0002] M-BUS (METER-BUS) bus is a European 2-wire bus standard. It is a data bus standard specially designed for measuring instruments and counters to transmit information. It is widely used in the measurement fields of water, electricity and gas. At present, it is still the standard instrument bus in China and even in the world. Applicable to the M-BUS instrument, the current obtained from the M-BUS bus is limited to less than 1.5mA during normal operation, and it is fixed. In some applications, the instruments on the M-BUS bus need to expand the current demand, such as the M-BUS gas meter, which needs to operate the gas meter valve, and requires a driving current of tens of mA to more than 100mA. There are generally two ways to obtain this current. One is to build a disposable auxiliary battery. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H04L12/10H04L12/40
CPCH02J7/0068H02J7/345H04L12/10H04L12/40006H04L2012/40228
Inventor 金颖锋王冕
Owner 上海云衡科技有限公司