Efficient and reliable alternating current distribution circuit system

Abstract

The invention discloses an efficient and reliable alternating-current distribution circuit system, which comprises an alternating-current input delay control circuit, an alternating-current input control circuit, a mechanical interlocking control circuit, an output control circuit and an auxiliary source power supply circuit, and is characterized in that the alternating-current input delay control circuit is used for selecting and controlling transmission of only one path of alternating-current control input signal; the alternating current input control circuit is used for controlling a mechanical interlocking contactor of the mechanical interlocking control circuit to act after receiving an alternating current control input signal, and sending one path of alternating current input voltage to the output control circuit; the output control circuit is used for outputting alternating current input voltage through two paths of alternating current contactors which are mutually redundant; and the auxiliary source power supply circuit is used for providing alternating current or direct current power supply for the alternating current input delay control circuit, the alternating current input control circuit, the mechanical interlocking control circuit and the output control circuit. The circuit is clear in relation, reliable in performance, easy to implement and wide in application range.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical applications, and in particular relates to an efficient and reliable alternating current distribution circuit system. Background Art

[0002] In actual production, some special-purpose AC power supplies require remote control of power supply equipment and redundant power supply, which requires the power supply equipment to provide a control circuit and have two identical AC power supplies to back up each other to ensure the robustness of the power supply system. However, the output voltage phases of the two AC power supplies generally have a phase difference. Once they are connected together, a short circuit will occur, which will inevitably cause the power supply equipment to be instantly overloaded and damaged or trigger the power supply equipment overload protection to power off and shut down, thereby shutting down other electrical equipment in the entire power supply system, causing unexpected losses. Therefore, an efficient and reliable AC distribution circuit needs to be added to the AC power supply and distribution. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides an efficient and reliable AC power distribution circuit system with clear circuit relationship, reliable performance, multi-level protection, easy implementation, strong principle transferability and wide application range.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] An efficient and reliable AC power distribution circuit system includes an AC input delay control circuit, an AC input control circuit, a mechanical interlocking control circuit, an output control circuit, and an auxiliary power supply circuit, wherein:

[0006] The AC input delay control circuit is used to select and control only one AC control input signal to be sent;

[0007] The AC input control circuit is used to control the action of the mechanical interlock contactor of the mechanical interlock control circuit after receiving the AC control input signal, and send the AC input voltage to the output control circuit;

[0008] The output control circuit is used to output the one-way AC input voltage through two mutually redundant AC contactors;

[0009] The auxiliary power supply circuit is used to supply power to the AC input delay control circuit, the AC input control circuit, the mechanical interlocking control circuit, and the output control circuit.

[0010] Furthermore, the AC input delay control circuit includes a delay circuit △T1 and a delay circuit △T2 with the same circuit structure, and the charging time of the delay circuit △T2 is greater than the charging time of the delay circuit △T1; wherein, the relay K15B included in the delay circuit △T1 and the relay K16B included in the delay circuit △T2 electrically interlock the delay circuit △T2 and the delay circuit △T1 to ensure that after the two AC input connection signals S1 and S2 are processed, only one AC control input signal is issued.

[0011] Furthermore, the AC input control circuit includes parallel relays K3A, K4A and parallel relays K5A, K6A, which are used to control the corresponding mechanical interlocking contactor action according to the received AC control input signal; wherein the parallel relays K3A, K4A are connected in series with the switch K15E, and the parallel relays K5A, K6A are connected in series with the switch K16E.

[0012] Furthermore, the mechanical interlocking control circuit includes an AC mechanical interlocking contactor K11, and the AC mechanical interlocking contactor K11 includes multiple parallel receiving channels. After connecting one AC control input signal, it will no longer operate if another AC control input signal is received.

[0013] Furthermore, the output control circuit includes two redundantly connected AC contactors in parallel. After ensuring that the input voltage of the AC power supply is normal, the three-phase output of AC power A, B, and C is controlled through the double-section switch S13.

[0014] Furthermore, the auxiliary power supply circuit includes two auxiliary power supply units, which respectively supply power to each relay and contactor, and the supply voltages of the two auxiliary power supply units are determined according to the requirements of the relays and contactors.

[0015] The beneficial effects of the present invention are:

[0016] The circuit adopts two interlocking methods: electrical interlocking and mechanical interlocking, which can realize AC output while eliminating the possibility of short circuit. The circuit relationship is clear, the performance is reliable, the multi-level protection is easy to implement, the principle is highly transferable, and the scope of application is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of an efficient and reliable AC power distribution circuit system of the present invention. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] The present invention provides an efficient and reliable implementation of an AC power distribution circuit system for certain special-purpose AC power supplies that require remote control of power supply equipment and redundant power supply.

[0020] An efficient and reliable AC power distribution circuit system comprises an AC input delay control circuit, an AC input control circuit, a mechanical interlocking control circuit, an output control circuit and an auxiliary power supply circuit, wherein the AC input delay control circuit is used to select and control only one AC control input signal to be sent; the AC input control circuit is used to control the action of the mechanical interlocking contactor of the mechanical interlocking control circuit after receiving the AC control input signal, and send one AC input voltage to the output control circuit; the output control circuit is used to output the AC input voltage through two mutually redundant AC contactors; the auxiliary power supply circuit is used to supply power to the AC input delay control circuit, the AC input control circuit, the mechanical interlocking control circuit and the output control circuit.

[0021] The AC input delay control circuit comprises a delay circuit △T1 and a delay circuit △T2 with the same circuit structure, wherein the charging time of the delay circuit △T2 is greater than the charging time of the delay circuit △T1; wherein the relay K15B included in the delay circuit △T1 and the relay K16B included in the delay circuit △T2 electrically interlock the delay circuit △T2 and the delay circuit △T1, thereby ensuring that after the two AC input connection signals S1 and S2 are processed, only one AC control input signal is sent, and preventing malfunctions caused by interference.

[0022] The AC input control circuit includes parallel relays K3A and K4A and parallel relays K5A and K6A, which are used to control the corresponding mechanical interlocking contactor action according to the received AC control input signal; wherein the parallel relays K3A and K4A are connected in series with the switch K15E, and the parallel relays K5A and K6A are connected in series with the switch K16E.

[0023] When the contactor drive coil power supplies L1 and N1 are normal, the mechanical interlock control circuit, including the AC mechanical interlock contactor K11, will no longer operate if it receives another AC control input signal (such as K11-K2) after connecting one AC control input signal (such as K11-K1).

[0024] The output control circuit includes two redundant parallel AC contactors. After ensuring that the AC power input voltage is normal, the A, B, and C AC outputs are controlled through the double-section switch S13.

[0025] The auxiliary power supply circuit includes two auxiliary power supply units, which supply power to each relay and contactor according to the requirements of the relays and contactors.

[0026] When the input control switch S1 of the first AC power supply in the delay circuit △T1 in the AC input delay control circuit is turned on, the DC auxiliary power supply charges C4 through the relay contact K16B and the RC charging circuit R8 and R9. During the charging process of C4, the voltage across the two ends increases. When the voltage is greater than the voltage regulation value of V36, the N-channel MOS field effect transistor Q1 will be turned on, and the relay K15 (K15A) will be activated to send a control signal to the AC input control circuit; if the relays K3A and K4A in the AC input control circuit are activated, the AC mechanical interlock contactor K11-K1 in the mechanical interlock control circuit will be activated, and the AC power supply 1 input is ready for output; after ensuring that the AC power supply 1 input is normal, the AC voltage output is controlled by S13. The output of the AC power supply 2 input is the same as the AC power supply 1 input (all relays A are replaced with B, and vice versa, such as Figure 1 However, both cannot be output at the same time.

[0027] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific 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 scope of protection of the present invention.

Claims

1. An efficient and reliable AC power distribution circuit system, characterized in that: It includes AC input delay control circuit, AC input control circuit, mechanical interlock control circuit, output control circuit and auxiliary power supply circuit, among which: The AC input delay control circuit is used to select and control only one AC control input signal to be sent; The AC input control circuit is used to control the action of the mechanical interlock contactor of the mechanical interlock control circuit after receiving the AC control input signal, and send the AC input voltage to the output control circuit; The output control circuit is used to output the one-way AC input voltage through two mutually redundant AC contactors; The auxiliary power supply circuit is used to supply power to the AC input delay control circuit, the AC input control circuit, the mechanical interlocking control circuit, and the output control circuit.

2. An efficient and reliable AC power distribution circuit system according to claim 1, characterized in that: The AC input delay control circuit includes a delay circuit △T1 and a delay circuit △T2 with the same circuit structure, and the charging time of the delay circuit △T2 is greater than the charging time of the delay circuit △T1; wherein, the relay K15B included in the delay circuit △T1 and the relay K16B included in the delay circuit △T2 electrically interlock the delay circuit △T2 and the delay circuit △T1 to ensure that after the two AC input connection signals S1 and S2 are processed, only one AC control input signal is sent.

3. The efficient and reliable AC power distribution circuit system according to claim 1, characterized in that: The AC input control circuit includes parallel relays K3A and K4A and parallel relays K5A and K6A, which are used to control the corresponding mechanical interlocking contactor action according to the received AC control input signal; wherein the parallel relays K3A and K4A are connected in series with the switch K15E, and the parallel relays K5A and K6A are connected in series with the switch K16E.

4. The efficient and reliable AC power distribution circuit system according to claim 1, characterized in that: The mechanical interlocking control circuit includes an AC mechanical interlocking contactor K11, which includes multiple receiving channels connected in parallel. After one AC control input signal is connected, the AC mechanical interlocking contactor K11 will no longer operate if another AC control input signal is received.

5. The efficient and reliable AC power distribution circuit system according to claim 1, characterized in that: The output control circuit includes two redundant parallel AC contactors. After ensuring that the input voltage of the AC power supply is normal, the three-phase output of AC power A, B, and C is controlled through the double-section switch S13.

6. The efficient and reliable AC power distribution circuit system according to claim 1, characterized in that: The auxiliary power supply circuit includes two auxiliary power supply units, which respectively supply power to each relay and contactor. The supply voltages of the two auxiliary power supply units are determined according to the requirements of the relays and contactors.

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