Power supply module for connecting sensor and power meter

Abstract

The utility model relates to the technical field of sensor and power meter power supply, and provides a power supply module for connecting a sensor and a power meter, which comprises a main circuit, a display circuit and a connection interface. According to the utility model, a power supply module which is much smaller than a switching power supply is adopted for design. A switching power supply is selected to supply power to a multi-path DC-DC power supply module, a circuit board is designed in cooperation with a filter circuit and a protection circuit to solve the problem of disordered internal wiring, a DB9 port is used for leading out power supply voltage to supply power to a plurality of current sensors, and a display circuit is designed to remind whether the interior of the circuit is damaged or not all the time. And the output signal of the current sensor is connected to the power analyzer through the socket in the power supply box, so that a plurality of wiring errors are simplified, the simultaneous power supply of the plurality of current sensors is realized, and the problem of large occupied space during working is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply for sensors and power meters, and in particular to a power supply module for connecting a sensor and a power meter. Background Art

[0002] The current sensors currently available on the market use a single switching power supply or a power box that puts multiple switching power supplies together. Both types have certain defects. A single switching power supply has complex wiring, and the wire groups are too many and overall chaotic. When multiple current sensors are working at the same time, it is easy for the wiring to be intertwined, causing confusion on site and causing unnecessary troubles such as short circuits or wiring errors. Although the power box formed by multiple switching power supplies solves the problem of multiple and complex external wire groups, the internal wiring is still complicated and intertwined. Long-term use of the line aging easily leads to short circuits, which affects the service life. Utility Model Content

[0003] In order to solve the problems existing in the background technology, the utility model provides a power supply module for connecting a sensor and a power meter, which includes a main circuit, a display circuit and a connection interface.

[0004] The main circuit is provided with an AC-DC switching power supply module and a plurality of DC-DC power supply modules with an output of ±15V, and the AC-DC switching power supply module supplies power to the plurality of DC-DC power supply modules;

[0005] The display circuit is provided with a number of LED lights, which are powered by the DC-DC power supply module and are used to monitor whether the DC-DC power supply modules of the main circuit are outputting normally;

[0006] The connection interface includes a DB9 interface for connecting a current sensor and a rubber plug base for connecting a power analyzer;

[0007] The output of the DC-DC power module is filtered by a capacitor, and a resettable fuse is used for current limiting protection, and then connected to the DB9 interface to output voltage.

[0008] In the preferred solution, the main circuit includes a single high-power AC-DC switching power supply with an output of 24V, and multiple outputs of

[0009] ±15V DC-DC power module is powered, and C19 is a 1000uf electrolytic capacitor mainly used as primary filtering, which is used for filtering when the AC-DC switching power supply supplies power to the DC-DC power module. Two electrolytic capacitors C1 and C3, which are 470uf respectively, are connected in parallel at both ends of the DC-DC power module output for filtering, filtering out some harmonics to keep the voltage output stable.

[0010] In a preferred solution, a 1.35A resettable fuse is connected in series at both ends of the DC-DC power module U1 to prevent damage to the DC-DC power module U1 caused by an external short circuit and to limit the current.

[0011] In the preferred solution, the DC-DC power module U1 and the ground wire are connected to the DB9 interface as power supply for the current sensor, and the positive and negative ends of the signal returned by the current sensor are connected to the rubber plug base through the DB9 interface, the rubber plug base is connected to the rubber plug by means of a wiring harness, and an external power analyzer is connected for measurement.

[0012] In the preferred solution, each DC-DC power supply module in the display circuit is configured with two LED display lights, one is a +15V output display LED1, and the other is a -15V output display LED2; and R1 and R2 are provided for shunting to prevent damage to the LED lamp; a resistor R17 is connected in parallel between +15V and ground, and R18 is connected in parallel between -15V and ground.

[0013] In the preferred solution, R1 and R2 are resistors with a resistance of 1K.

[0014] In the preferred solution, R17 and R18 are resistors with a resistance value of 2k and a power of 2W.

[0015] The beneficial effects achieved by the utility model are:

[0016] The utility model is designed with a power supply module that is much smaller than a switching power supply. A switching power supply is selected to power multiple DC-DC power supply modules, and a circuit board is designed in combination with a filter circuit and a protection circuit to solve the problem of internal wiring disorder. The power supply voltage is drawn out by the DB9 port to power multiple current sensors. The display circuit is designed to remind whether there is damage inside the circuit at all times, and the output signal of the current sensor is connected to the power analyzer through the socket inside the power box, thereby simplifying many wiring errors and solving the problem of powering multiple current sensors at the same time, and solving the problem of occupying a large space during work. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the overall scheme diagram of the utility model;

[0018] Figure 2 It is the circuit structure diagram of the main circuit;

[0019] Figure 3 It is a circuit structure diagram showing the circuit. DETAILED DESCRIPTION

[0020] The technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative, and the utility model is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0021] Reference Figure 1-Figure 3 The main circuit of the utility model is provided with an AC-DC switching power supply module and a plurality of DC-DC power supply modules with an output of ±15V, and the AC-DC switching power supply module supplies power to the plurality of DC-DC power supply modules; the display circuit is provided with a plurality of LED lights, which are powered by the DC-DC power supply module and are used to monitor whether the DC-DC power supply modules of the main circuit are outputting normally; the connection interface includes a DB9 interface for connecting a current sensor and a rubber plug base for connecting a power analyzer.

[0022] like Figure 2 As shown, the output of the DC-DC power module is filtered through a capacitor, and a self-recovery fuse is used for current limiting protection, and then connected to the DB9 interface to output voltage. The main circuit includes a single high-power AC-DC switching power supply with an output of 24V, which supplies power to multiple DC-DC power modules with an output of ±15V. C19 is a 1000uf electrolytic capacitor mainly used as a primary filter, which is used for filtering when the AC-DC switching power supply supplies power to the DC-DC power module. C1 and C3 are two 470uf electrolytic capacitors connected in parallel at both ends of the DC-DC power module output for filtering, filtering out some harmonics to keep the voltage output stable.

[0023] A 1.35A resettable fuse is connected in series at both ends of the DC-DC power module U1 to prevent damage to the DC-DC power module U1 caused by external short circuit and to limit the current. The DC-DC power module U1 and the ground wire are connected to the DB9 interface as the power supply for the current sensor, and the positive and negative ends of the signal returned by the current sensor are connected to the rubber plug base through the DB9 interface. The rubber plug base is connected to the rubber plug by wiring, and an external power analyzer is connected for measurement.

[0024] Each DC-DC power supply module in the display circuit is equipped with two LED display lights, one is +15V output to display LED1, and the other is -15V output to display LED2; and R1 and R2 are provided to shunt to prevent damage to the LED lamp; R1 and R2 are resistors with a resistance of 1K. Resistor R17 is connected in parallel between +15V and ground, and R18 is connected in parallel between -15V and ground. R17 and R18 are preferably resistors with a resistance of 2k and a power of 2W. Because of the existence of the filter capacitor, the capacitor is charged when the power is turned on, and when the power is turned off, the capacitor needs to be discharged as soon as possible, so the parallel resistor is used for discharge. If the discharge process is not performed, the LED indicator light will be off for a long time, and it will not be possible to better monitor whether the ±15V is output normally, so the parallel resistor is used for discharge.

[0025] The utility model adopts an AC-DC switching power supply to power multiple DC-DC power modules to design a circuit board, which better solves the problem of multiple internal wiring in the current market with multiple switching power supplies, and is easier to save space and more compact overall. A display board is used to provide real-time monitoring of the power supply. If a fault is found, a judgment and repair can be made more quickly. Compared with the existing technology, the problem can be located faster, which improves efficiency.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A power supply module connecting a sensor and a power meter, characterized in that: It includes a main circuit, a display circuit and a connection interface, among which: The main circuit is provided with an AC-DC switching power supply module and a plurality of DC-DC power supply modules with an output of ±15V, and the AC-DC switching power supply module supplies power to the plurality of DC-DC power supply modules; The display circuit is provided with a number of LED lights, which are powered by the DC-DC power supply module and are used to monitor whether the DC-DC power supply modules of the main circuit are outputting normally; The connection interface includes a DB9 interface for connecting a current sensor and a rubber plug base for connecting a power analyzer; The output of the DC-DC power module is filtered by a capacitor, and a resettable fuse is used for current limiting protection, and then connected to the DB9 interface to output voltage.

2. The power supply module for connecting a sensor and a power meter according to claim 1, characterized in that: The main circuit includes a single high-power AC-DC switching power supply with an output of 24V, which supplies power to multiple DC-DC power modules with an output of ±15V. C19 is a 1000uf electrolytic capacitor mainly used as primary filtering, which is used for filtering when the AC-DC switching power supply supplies power to the DC-DC power module. Two electrolytic capacitors C1 and C3, which are 470uf respectively, are connected in parallel at both ends of the DC-DC power module output for filtering, filtering out some harmonics to keep the voltage output stable.

3. The power supply module for connecting a sensor and a power meter according to claim 1, characterized in that: A 1.35A resettable fuse is connected in series at both ends of the DC-DC power module U1 to prevent damage to the DC-DC power module U1 caused by an external short circuit and to limit the current.

4. The power supply module for connecting a sensor and a power meter according to claim 1, characterized in that: The DC-DC power module U1 and the ground wire are connected to the DB9 interface as power supply for the current sensor, and the positive and negative ends of the signal returned by the current sensor are connected to the rubber plug base through the DB9 interface. The rubber plug base is connected to the rubber plug by wiring, and an external power analyzer is connected for measurement.

5. The power supply module for connecting a sensor and a power meter according to claim 1, characterized in that: Each DC-DC power supply module in the display circuit is equipped with two LED display lights, one is +15V output to display LED1, and the other is -15V output to display LED2; R1 and R2 are provided to shunt current to prevent damage to the LED lamp; a resistor R17 is connected in parallel between +15V and ground, and a resistor R18 is connected in parallel between -15V and ground.

6. The power supply module for connecting a sensor and a power meter according to claim 5, characterized in that: R1 and R2 are resistors with a resistance of 1K.

7. The power supply module for connecting a sensor and a power meter according to claim 5, characterized in that: R17 and R18 are resistors with a resistance of 2k and a power of 2W.

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