Local display and control compatible remote display and control circuit of inverter power supply

Abstract

The invention relates to a local display and control compatible remote display and control circuit of an inverter power supply, which is characterized in that a remote control relay K1, a remote power-on button SB1, a remote power-off button SB2, a remote operation indicating lamp HL1 and a remote fault indicating lamp HL2 are additionally arranged on the basis of a local control panel and a local touch display and control screen; through logic association of added remote relay, switch and indicating lamp signals and input and output control signals of a local control board, a local display control compatible remote display control circuit of the inverter power supply is established, local and remote stable compatible control is realized, remote signals adopt a remote relay, button and indicating lamp hard connection mode, and the local display control compatible remote display control circuit is realized. And low-cost and reliable local and remote display control for the inverter power supply is realized. The problems that long-distance CAN communication remote control is easy to interfere and remote display control fails to cause remote control failure in an existing inverter power supply local button control and CAN communication remote control mode are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to a display control technology field, in particular to a local display control compatible remote display control circuit of an inverter power supply. BACKGROUND

[0002] With the rapid progress of energy storage technology, green pure electric ships are booming, and the inverter power supply converts the battery direct current into alternating current to supply power to the entire ship alternating current load. The inverter power supply is becoming more and more important on pure electric ships. The inverter power supply not only needs local control and display, but also needs remote control and display to reduce the number of personnel on site, facilitate centralized control, and respond to emergencies in a timely manner. The existing local and remote display control circuit usually adopts local button control and CAN communication remote control mode, which has the problem of remote control failure caused by long-distance communication interference or remote display control failure. SUMMARY

[0003] In view of the problem of remote control failure caused by long-distance CAN communication remote control interference and remote display control failure of the local button control and CAN communication remote control mode of the inverter power supply, a local display control compatible remote display control circuit of an inverter power supply is proposed.

[0004] The technical scheme of the present application is: a local display control compatible remote display control circuit of an inverter power supply, comprising a local control panel, a local touch display control screen, a remote control relay K1, a remote start button SB1, a remote shutdown button SB2, a remote running indicator HL1 and a remote fault indicator HL2.

[0005] The local control panel comprises an ARM controller, an opto-isolating input circuit, K2-K4 signal relays, a CAN interface circuit and a conditioning circuit.

[0006] The ARM controller receives the on-off signals IO1 output by the opto-isolating input circuit, the CAN communication signals converted by the CAN interface circuit receiving the operation signals transmitted by the local touch display control screen, and the signals sampled from the main circuit of the inverter power supply and conditioned by the conditioning circuit. After information processing in the ARM controller, IO2, IO3 and IO4 control signals are output to control the remote control signal relay K2, the local control signal relay K3 and the fault signal relay K4 to act, and the control signals are output through the conditioning circuit to control the main circuit of the inverter power supply to work. The remote control relay K1, the remote start button SB1 and the remote shutdown button SB2 constitute a remote start or remote shutdown logic circuit. One end of the coil of the remote control relay K1 is connected to the external 24V ground, and the other end is connected to the normally open contact K2_NO1 of K2 and the normally open contact K3_NO1 of K3 in series.

[0007] The remote control relay K1 has three normally open contacts, K1_NO1, K1_NO2 and K1_NO3; the remote start button SB1 is a self-resetting normally open switch, and the remote shutdown button SB2 is a self-resetting normally closed switch.

[0008] The input end of the opto-coupler isolation input circuit is connected to one end of K1_NO1, and the other end of K1_NO1 is connected to 24V;

[0009] The remote start button SB1 is connected in parallel with K1_NO2, and one end of the parallel connection is connected to 24V, and the other end of the parallel connection is connected to the remote shutdown button SB2, and the other end of the remote shutdown button SB2 is connected to ground in sequence through K2_NO1 and K1 coil, thereby forming a remote on-off control circuit.

[0010] One end of the normally open contact K3_NO1 of K3 is connected to external 24V, and the other end of the normally open contact K3_NO1 is connected to the other end of the K1 coil away from the ground, thereby forming a local on-off control circuit.

[0011] One end of the remote running indicator HL1 and the remote fault indicator HL2 is connected to 24V ground, and the other end is connected to 24V through the normally open contact K4_NO1 of K4, respectively.

[0012] Preferably, the CAN interface circuit receives the operation signal transmitted by the local touch display screen, which includes a local start or local shutdown signal, and a local control or remote control signal.

[0013] Preferably, the opto-coupler isolation input circuit is composed of an isolation opto-coupler U1, an input end series current limiting resistor R1 and an output end pull-up resistor R2, and an external control on-off signal is converted into an IO1 signal with a matching ARM level through photoelectric isolation.

[0014] A design method of a local display control compatible remote display control of an inverter power supply, on the basis of a local control panel and a local touch display screen, a remote control relay K1, a remote start button SB1, a remote shutdown button SB2, a remote running indicator HL1 and a remote fault indicator HL2 are added, the input and output control signals of the local control panel are logically associated with the signals of the added remote relay, switch and indicator, and a local display control compatible remote display control circuit of the inverter power supply is established, thereby realizing stable and compatible control of the local and remote.

[0015] The local display control compatible remote display control circuit of the inverter power supply has the advantages that: the local display control screen, the remote relay, the button and the indicator are connected by hardwiring, and the local and remote display control of the inverter power supply is realized at low cost and is reliable. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a local display control compatible remote display control circuit diagram of the inverter power supply.

[0017] Figure 2 Figure 1 is a diagram of a local touch screen display control interface of the present application. DETAILED DESCRIPTION

[0018] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments are implemented on the premise of the technical solutions of the present application, and detailed implementation and specific operation processes are given, but the protection scope of the present application is not limited to the following embodiments.

[0019] As shown in Figure 2, the local control of the inverter power supply compatible with remote control circuit diagram includes a local control board, a local touch screen display control screen, a remote control relay K1, a remote power-on button SB1, a remote power-off button SB2, a remote running indicator HL1 and a remote fault indicator HL2. Figure 1

[0020] The local control board includes an ARM controller, an optical coupling isolation input circuit, K2-K4 signal relays, a CAN interface circuit and a conditioning circuit.

[0021] The ARM controller receives the on-off signal IO1 output by the optical coupling isolation input circuit, the CAN communication signal (local power-on / local power-off, local control / remote control) converted by the CAN interface circuit receiving the signal transmitted by the local touch screen display control screen and the signal sampled and conditioned from the main circuit of the inverter power supply, and outputs IO2, IO3 and IO4 control signals after information processing in the ARM controller, controls the actions of the remote control signal relay K2, the local control signal relay K3 and the fault signal relay K4, and outputs the control signal through the conditioning circuit to control the operation of the main circuit of the inverter power supply.

[0022] The optical coupling isolation input circuit is composed of an isolation optical coupling U1, an input end series current limiting resistor R1 and an output end pull-up resistor R2, generates an IO1 signal matching the ARM level through photoelectric isolation of the external control on-off signal, and has strong anti-interference ability. The isolation optical coupling U1 can be a PC817 optical coupling, the current limiting resistor R1 can be a 2.4kΩ-4kΩ 1206 type surface mount resistor, and the current limiting is 4mA-10mA, so that U1 can be reliably turned on and turned off. The pull-up resistor R2 is a 3.3k 0805 type surface mount resistor.

[0023] ​K2~K4 signal relay receives IO2~IO4 control signal output by ARM controller, controls action of respective normally open contact (K2_NO1, K3_NO1, K4_NO1). When IO2~IO4 is high level, K2~K4 signal relay acts, K2_NO1, K3_NO1, K4_NO1 is closed, when IO2~IO4 is low level, K2~K4 signal relay does not act, K2_NO1, K3_NO1, K4_NO1 is opened.

[0024] CAN interface circuit receives CAN communication signal (local start / local shutdown, local control / remote control) of local touch display screen, and outputs to ARM controller.

[0025] Conditioning circuit receives sampling signal of inverter power supply main circuit, and outputs to ARM controller after conditioning, and simultaneously receives output control signal of ARM controller, and outputs to inverter power supply main circuit after conditioning, and controls inverter power supply main circuit to work.

[0026] The remote control relay K1, remote start button SB1 and remote shutdown button SB2 constitute remote start or remote shutdown logic circuit. One end of the coil of the remote control relay K1 is connected to external 24V ground, and the other end is connected to the normally open contact K2_NO1 of K2 and the normally open contact K3_NO1 of K3 in series, and is controlled by the remote control signal relay K2 and the local control signal relay K3. The remote control relay K1 has three normally open contacts, which are K1_NO1, K1_NO2 and K1_NO3. The remote start button SB1 is a self-reset normally open switch, and the remote shutdown button SB2 is a self-reset normally closed switch.

[0027] The input end of the opto-coupler isolation input circuit is connected to one end of K1_NO1, and the other end of K1_NO1 is connected to 24V.

[0028] The remote start button SB1 is connected in parallel with K1_NO2, and one end of the parallel connection is connected to 24V, and the other end of the parallel connection is connected to one end of the remote shutdown button SB2, and the other end of the remote shutdown button SB2 is connected to ground in sequence through K2_NO1 and K1 coil in series connection, thereby forming a remote start and shutdown control circuit. In the remote control mode, K2 is closed, and K2_NO1 is turned on. After the remote start button SB1 is pressed, 24V is supplied to the K1 coil through the closed SB1 normally open switch, the SB2 normally closed switch, and the K2_NO1 normally open switch closed by the local control, and at this time, the K1_NO1, K1_NO2 and K1_NO3 three normally open contacts of K1 are closed. Before the SB1 is self-reset, K1_NO2 is closed, and after the SB1 is self-reset, 24V is supplied to the K1 coil through K1_NO2, so that the normally open contacts of K1 are always in a closed state. 24V is supplied to the internal light-emitting diode of the isolation optocoupler U1 through K1_NO1, so that IO1 is at a low level, and the ARM controller detects the start signal. After the remote shutdown button SB2 is pressed, the SB2 normally closed switch is opened, the K1 coil loses the 24V power supply, and the K1_NO1, K1_NO2 and K1_NO3 three normally open contacts of K1 are opened. Before the SB2 is self-reset, K1_NO2 is opened, and after the SB2 is self-reset, the K1 coil remains in a state without power supply. The K1_NO1 open state makes the internal light-emitting diode of U1 not work, IO1 is at a high level, and the ARM controller detects the shutdown signal.

[0029] One end of the normally open contact K3_NO1 of K3 is connected to external 24V, and the other end of the normally open contact K3_NO1 of K3 is connected to the other end of the K1 coil away from the ground, thereby forming a local start and shutdown control circuit.

[0030] One end of the remote operation indicator lamp HL1 and the remote fault indicator lamp HL2 is connected to 24V ground, and the other end of the remote operation indicator lamp HL1 and the remote fault indicator lamp HL2 is connected to 24V through the normally open contact K4_NO1 of K1_NO3 and K4 respectively. In the start state, K1_NO3 is closed, and the operation indicator lamp HL1 is bright. When the inverter power supply fails, the ARM output IO4 is at a high level, the K4 coil is powered, the K4 normally open contact is closed, 24V is supplied to the remote fault indicator lamp HL2 through K4_NO1, and the remote fault indicator lamp HL2 is bright.

[0031] The action conditions of the main components of the local and remote display control circuit in different states are as follows:

[0032]

[0033] The local touch display screen provides a man-machine interaction platform for local control, and the local touch display screen can be controlled by touch, such as Figure 2As shown, two control modes of local control / remote control are provided, and the touch screen can be selected as the local control mode or the remote control mode. The local touch screen is also provided with a local start icon and a local shutdown icon, and the operator can touch the screen to start or shutdown the local control mode. When the local control mode or the remote control mode is changed, the local start or local shutdown setting needs to be manually confirmed again to prevent misoperation.

[0034] Remote start mode: the local touch screen selects the remote control mode, K3 is disconnected, K2 is connected, and K2_NO1 is turned on. After the remote start button SB1 is pressed, 24V is supplied to the K1 coil through the SB1 normally open contact (turned on), the SB2 normally closed contact (turned on), and K2_NO1 (turned on), and the K1_NO1, K1_NO2, and K1_NO3 normally open contacts of K1 are turned on. K1_NO2 is turned on before SB1 is reset, and 24V is supplied to K1 through K1_NO2 (turned on) to keep K1 in a closed state after SB1 is reset. 24V is supplied to the internal light-emitting diode of U1 through K1_NO1 (turned on) to make IO1 low, and the ARM controller detects the start signal and controls the start of the inverter power supply main circuit through the conditioning circuit. The local touch screen running light is on, K1_NO3 is connected, the remote running indicator HL1 is on, and it is indicated that the inverter power supply is running normally.

[0035] Remote shutdown mode: the local touch screen selects the remote control mode, K3 is disconnected, K2 is connected, and K2_NO1 is turned on. When the inverter power supply is running normally, after the remote shutdown button SB2 is pressed, the SB2 normally closed contact is disconnected, the K1 coil loses the 24V power supply, and the K1_NO1, K1_NO2, and K1_NO3 normally open contacts of K1 are disconnected. K1_NO2 is disconnected before SB2 is reset, and the K1 coil remains in a state without power supply after SB2 is reset. The K1_NO1 is disconnected to make the internal light-emitting diode of U1 not work, IO1 is high, the ARM controller detects the shutdown signal, and controls the shutdown of the inverter power supply main circuit through the conditioning circuit. The local touch screen running light is off, K1_NO3 is disconnected, the remote running indicator HL1 is off, and it is indicated that the inverter power supply is in a shutdown state.

[0036] Local start mode: the local touch screen selects the local control mode, K2 is disconnected. The touch screen selects the local start, K3 is connected, 24V is supplied to the K1 coil through the normally open contact K3_NO1 (turned on) of K3, the K1_NO1, K1_NO2, and K1_NO3 normally open contacts of K1 are turned on, 24V is supplied to the internal light-emitting diode of U1 through K1_NO1 (turned on) to make IO1 low, the ARM controller detects the start signal, and controls the start of the inverter power supply main circuit through the conditioning circuit. The local touch screen running light is on, K1_NO3 is connected, the remote running indicator HL1 is on, and it is indicated that the inverter power supply is running normally.

[0037] Local shutdown mode: local touch screen selects local control mode, K2 is disconnected. The touch screen selects local shutdown, K3 is disconnected, K3_NO1 is disconnected, K1 coil loses power supply, K1_NO1, K1_NO2, K1_NO3 of K1 are disconnected. The K1_NO1 disconnected state makes the internal light-emitting diode of U1 not work, IO1 is high level, the ARM controller detects the shutdown signal, and controls the shutdown of the inverter power supply main circuit through the conditioning circuit. The local touch screen running light is off, K1_NO3 is disconnected, the remote running indicator light HL1 is off, and it is indicated that the inverter power supply is in the shutdown state.

[0038] Fault mode: when the inverter power supply fails, the ARM output IO4 is high level, K4 is closed, 24V is supplied to the remote fault indicator light HL2 through K4_NO1, HL2 is bright, and it is indicated that the inverter power supply is in the fault state.

[0039] The above-described embodiments only express the specific implementation of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the patent application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the patent application of the present application should be subject to the appended claims.

Claims

1. A local display and control compatible remote display and control circuit for an inverter power supply, characterized in that, Includes a local control board, a local touch display screen, a remote control relay K1, a remote power-on button SB1, a remote power-off button SB2, a remote operation indicator HL1, and a remote fault indicator HL2; The local control board includes an ARM controller, an optocoupler isolated input circuit, K2-K4 signal relays, a CAN interface circuit, and a conditioning circuit. The ARM controller receives the power-on / off signal IO1 from the optocoupler-isolated input circuit, the CAN communication signal converted from the operation signal transmitted from the touch screen via the CAN interface circuit, and the signal sampled and conditioned by the conditioning circuit from the main inverter circuit. After information processing in the ARM controller, it outputs control signals IO2, IO3, and IO4 to control the operation of the remote control signal relay K2, the local control signal relay K3, and the fault signal relay K4. The output control signal passes through the conditioning circuit to control the operation of the main inverter circuit. The remote control relay K1, the remote power-on button SB1, and the remote power-off button SB2 constitute the remote power-on or remote power-off logic circuit. One end of the coil of the remote control relay K1 is connected to the external 24V ground, and the other end is connected to the series connection point of the normally open contact K2_NO1 of K2 and the normally open contact K3_NO1 of K3. The remote control relay K1 has three normally open contacts, namely K1_NO1, K1_NO2, and K1_NO3; the remote power-on button SB1 is a self-resetting normally open switch, and the remote power-off button SB2 is a self-resetting normally closed switch. The input terminal of the optocoupler isolated input circuit is connected to one end of K1_NO1, and the other end of K1_NO1 is connected to 24V; The remote power-on button SB1 is connected in parallel with K1_NO2. One end of the parallel connection is connected to 24V, and the other end is connected to the remote power-off button SB2. The other end of the remote power-off button SB2 is connected to ground in series with the coil of K1 through K2_NO1, thus forming a remote power-on / off control circuit. One end of the normally open contact K3_NO1 of K3 is connected to an external 24V, and the other end is connected to the other end of the K1 coil away from ground, forming a local power-on / off control circuit. The remote operation indicator HL1 and the remote fault indicator HL2 are both connected to 24V ground at one end, and the other end is connected to 24V through the normally open contact K4_NO1 of K1_NO3 and K4 respectively.

2. The local display and control compatible remote display and control circuit of the inverter power supply according to claim 1, characterized in that, The CAN interface circuit receives operation signals from the touch screen, including local power-on or local power-off signals, as well as local or remote control signals.

3. The local display and control compatible remote display and control circuit of the inverter power supply according to claim 1, characterized in that, The optocoupler isolation input circuit consists of an isolation optocoupler U1, an input current-limiting resistor R1 connected in series, and an output pull-up resistor R2. It generates an IO1 signal matching the ARM level by opto-isolating the external control power-on / off signal.

4. A design method for a local display and control compatible with remote display and control of an inverter power supply, characterized in that, Based on the local control board and local touch display screen, a remote control relay K1, a remote power-on button SB1, a remote power-off button SB2, a remote operation indicator HL1, and a remote fault indicator HL2 are added. By logically associating the signals of the added remote relays, switches, and indicator lights with the input and output control signals of the local control board, a local display control compatible with remote display control circuit of the inverter power supply described in claim 1 is established, realizing stable local and remote compatible control.

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