Circuit capable of monitoring and protecting radiating fan of Siemens frequency converter

Abstract

The utility model discloses a circuit capable of monitoring and protecting a radiating fan of a Siemens frequency converter, which comprises a filter connector, one end of the filter connector is connected with an inverter, one end of the inverter is connected with a direct current output piece, and the other end of the inverter is connected with a voltage detection input piece. According to the circuit capable of monitoring and protecting the radiating fan of the Siemens frequency converter, a fuse on an original circuit is replaced by the Siemens adjustable current circuit breaker, when the radiating fan of the frequency converter breaks down, only the circuit breaker trips, and the circuit can be normally used after resetting; the auxiliary contact of the Siemens adjustable current circuit breaker is used for outputting fault alarm information of the cooling fan of the frequency converter, so that the fault can be found and eliminated more efficiently and quickly when the fault occurs; a current monitoring relay is added on the basis of an original circuit, and whether the cooling fan of the frequency converter operates normally or not can be checked more conveniently and quickly in a normal starting operation state.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical control, in particular to a circuit capable of monitoring and protecting a cooling fan of a Siemens frequency converter. Background Art

[0002] The variable frequency motor cooling fan is a device that uses a variable frequency motor to drive the fan blades for heat dissipation. Its principle is to convert electrical energy into mechanical energy, and drive the fan blades to rotate at high speed through the variable frequency motor to generate strong wind. The fan blades inhale air, accelerate the air through centrifugal force, form a strong airflow, and take away the heat generated by high temperature. The variable frequency motor cooling fan should be connected to the circuit of the inverter cooling fan before use.

[0003] However, the traditional Siemens inverter cooling fan has the following disadvantages:

[0004] The circuit power supply of the traditional Siemens inverter cooling fan is through two fuses. There is no independent switch in the circuit design. When the inverter cooling fan fails and the fuse burns out, there is no fault signal output prompt in the system. Similarly, there is no way to know whether the cooling fan is started when the inverter is started. If the cooling fan fails to work normally, the inverter will overheat and shut down. Utility Model Content

[0005] The purpose of the utility model is to provide a circuit that can monitor and protect the cooling fan of a Siemens inverter, so as to solve the problem that the circuit power supply of the cooling fan of a traditional Siemens inverter proposed in the above background technology is through two fuses, and there is no independent switch in the circuit design. When the inverter cooling fan fails and the fuse is blown, there is no fault signal output prompt in the system. Similarly, it is impossible to know whether the cooling fan is started when the inverter is started. If the cooling fan cannot work normally, it will cause the inverter to overheat and shut down.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a circuit capable of monitoring and protecting a cooling fan of a Siemens inverter, comprising a filter connection connector, one end of the filter connection connector is connected to an inverter, one end of the inverter is connected to a DC output component, the other end of the inverter is connected to a voltage detection input component, one end of one side of the inverter is connected to an auxiliary voltage component, the middle of one side of the inverter is connected to a power supply control component, the other end of one side of the inverter is connected to a control unit power supply component, the surface of the inverter is connected to an internal communication access component, and the inverter comprises L1, K10, G1, PLC.I5.6, PLC.I5.5, A30, A1 , A2, X272, A70, IPD, CIM and Q42, pin 1 of Q42 is connected to one end of L1, pin 21 of Q42 is connected to one end of PLC.I5.6, pin 6 of Q42 is connected to pin 11 of K10, pin 14 of K10 is connected to one end of PLC.I5.5, one end of C-end pin G1 of PLC.I5.5 is connected, pin 21 of K10 is connected to one end of A1, pin 24 of K10 is connected to one end of A2, pin 2 of A1 and pin A2 are both connected to one end of X272, the other end of X272 is connected to one end of A70, and the PE end of A70 is grounded.

[0007] Preferably, the filter connection joint includes U1, V1 and W1, and one end of U1, one end of V1 and one end of W1 are all connected to one end of A30.

[0008] Preferably, the voltage detection input component includes DCPA, DCNA, D, 2-F20, 2-F22 and DC-N, one end of the DCPA, one end of the DCNA and one end of the D are all connected to the end directly opposite to A30, the other end of the D is respectively connected to one end of 2-F20 and one end of 2-F22, and the other end of 2-F20 and the other end of 2-F22 are both connected to one end of DC-N.

[0009] Preferably, the DC output device includes PE2C, 2-F21, 2-F19 and DC-P, one end of the PE2C is connected to the end opposite to A30, the other end of the PE2C is respectively connected to one end of 2-F21 and one end of 2-F19, and the other end of 2-F21 and the other end of 2-F19 are both connected to one end of DC-P.

[0010] Preferably, the auxiliary voltage component includes 1-P24, 1-M56, 1P24-1 and 2M-1, one end of the 1-P24 is connected to one end of the 1P24-1, one end of the 1-M56 is connected to one end of the 2M-1, and the other ends of the 1P24-1 and 2M-1 are both connected to the P24M end of A70.

[0011] Preferably, the power control component includes X41, X42, T2-CU-P24 and T2-CU-M, one end of the X41 is connected to the 1EPM1 end of the IPD, the other end of the X41 is connected to the 3M end of the IPD, one end of the X42 is connected to the 2EP end of the IPD, the other end of the X42 is connected to the 1P24L end of the IPD, one end of the T2-CU-P24 is connected to the 2P24L end of the IPD, and one end of the T2-CU-M is connected to the 4M end of the IPD.

[0012] Preferably, the control unit power supply comprises X400, X401 and X402, and one end of X401, one end of X401 and one end of X402 are all connected to the DSA-1..8 end of the CIM.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The fuse on the original circuit was replaced with a Siemens adjustable current circuit breaker. When the inverter cooling fan fails, it will only cause the circuit breaker to trip, and it can be used normally after resetting;

[0015] 2. Compared with the original circuit using fuse protection, the auxiliary contact of Siemens adjustable current circuit breaker is used to output the fault alarm information of the inverter cooling fan, which makes it more efficient and quick to find and eliminate the fault when it occurs;

[0016] 3. Add a current monitoring relay to the original circuit, which can more conveniently and quickly check whether the inverter cooling fan is operating normally under normal startup and operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] See also Figure 1The utility model provides a circuit capable of monitoring and protecting a cooling fan of a Siemens frequency converter, comprising a filter connection joint, one end of the filter connection joint is connected to an inverter, one end of the inverter is connected to a DC output component, the other end of the inverter is connected to a voltage detection input component, one end of one side of the inverter is connected to an auxiliary voltage component, the middle of one side of the inverter is connected to a power control component, the other end of one side of the inverter is connected to a control unit power supply component, the surface of the inverter is connected to an internal communication access component, and the inverter comprises L1, K10, G1, PLC.I5.6, PLC.I5.5, A30, A1, A2, X 272, A70, IPD, CIM and Q42, pin 1 of Q42 is connected to one end of L1, pin 21 of Q42 is connected to one end of PLC.I5.6, pin 6 of Q42 is connected to pin 11 of K10, pin 14 of K10 is connected to one end of PLC.I5.5, one end of C-end pin G1 of PLC.I5.5 is connected, pin 21 of K10 is connected to one end of A1, pin 24 of K10 is connected to one end of A2, pin 2 of A1 and pin A2 are both connected to one end of X272, the other end of X272 is connected to one end of A70, and the PE end of A70 is grounded.

[0020] The filter connection joints include U1, V1 and W1, and one end of U1, one end of V1 and one end of W1 are all connected to one end of A30.

[0021] The voltage detection input components include DCPA, DCNA, D, 2-F20, 2-F22 and DC-N. One end of DCPA, one end of DCNA and one end of D are all connected to the end directly opposite to A30, the other end of D is respectively connected to one end of 2-F20 and one end of 2-F22, and the other end of 2-F20 and the other end of 2-F22 are both connected to one end of DC-N.

[0022] The DC output device includes PE2C, 2-F21, 2-F19 and DC-P. One end of PE2C is connected to the end opposite to A30, and the other end of PE2C is respectively connected to one end of 2-F21 and one end of 2-F19. The other end of 2-F21 and the other end of 2-F19 are both connected to one end of DC-P.

[0023] The auxiliary voltage component includes 1-P24, 1-M56, 1P24-1 and 2M-1. One end of 1-P24 is connected to one end of 1P24-1, one end of 1-M56 is connected to one end of 2M-1, and the other ends of 1P24-1 and 2M-1 are both connected to the P24M end of A70.

[0024] The power control components include X41, X42, T2-CU-P24 and T2-CU-M. One end of X41 is connected to one end of 1EPM1 of IPD, the other end of X41 is connected to one end of 3M of IPD, one end of X42 is connected to one end of 2EP of IPD, the other end of X42 is connected to one end of 1P24L of IPD, one end of T2-CU-P24 is connected to the 2P24L of IPD, and one end of T2-CU-M is connected to the 4M end of IPD.

[0025] The control unit power supply includes X400, X401 and X402, and one end of X401, one end of X401 and one end of X402 are all connected to the DSA-1..8 ends of the CIM.

[0026] When the embodiment of the present application is in use: the fuse is cancelled on the basis of the original circuit, and is replaced by a Siemens current-adjustable circuit breaker for input and output control, which can also output an alarm signal. A current monitoring relay is installed at the input end of the cooling fan's main power supply, and the actual operating current of the cooling fan is measured as the set value. If the operating current is less than 1A when the machine is turned on, an alarm will be triggered.

[0027] Add a Siemens current-adjustable circuit breaker to the circuit. If the cooling fan fails, the circuit breaker will trip and stop supplying power. At the same time, the circuit breaker also has auxiliary contacts that can output a fault alarm signal through the control circuit. Add a current monitoring relay to the power input end of the cooling fan to measure the actual operating current of the cooling fan as the set value. If the operating current is less than 1A in the powered-on state, an alarm will be triggered. In this way, you can know whether the cooling fan is operating normally when the power is on.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A circuit capable of monitoring and protecting a cooling fan of a Siemens inverter, comprising a filter connection connector, characterized in that: One end of the filter connection connector is connected to an inverter, one end of the inverter is connected to a DC output component, the other end of the inverter is connected to a voltage detection input component, one end of one side of the inverter is connected to an auxiliary voltage component, the middle of one side of the inverter is connected to a power supply control component, the other end of one side of the inverter is connected to a control unit power supply component, the surface of the inverter is connected to an internal communication access component, the inverter includes L1, K10, G1, PLC.I5.6, PLC.I5.5, A30, A1, A2, X272, A70, IPD, CIM and Q42, the Q Pin 1 of Q42 is connected to one end of L1, pin 21 of Q42 is connected to one end of PLC.I5.6, pin 6 of Q42 is connected to pin 11 of K10, pin 14 of K10 is connected to one end of PLC.I5.5, pin C of PLC.I5.5 is connected to one end of G1, pin 21 of K10 is connected to one end of A1, pin 24 of K10 is connected to one end of A2, pin 2 of A1 and pin A2 are both connected to one end of X272, the other end of X272 is connected to one end of A70, and the PE end of A70 is grounded.

2. The circuit capable of monitoring and protecting a cooling fan of a Siemens inverter according to claim 1, characterized in that: The filter connection joint includes U1, V1 and W1, and one end of U1, one end of V1 and one end of W1 are all connected to one end of A30.

3. The circuit capable of monitoring and protecting a cooling fan of a Siemens inverter according to claim 1 is characterized in that: The voltage detection input component includes DCPA, DCNA, D, 2-F20, 2-F22 and DC-N. One end of DCPA, one end of DCNA and one end of D are all connected to the end directly opposite to A30, and the other end of D is respectively connected to one end of 2-F20 and one end of 2-F22, and the other end of 2-F20 and the other end of 2-F22 are both connected to one end of DC-N.

4. The circuit capable of monitoring and protecting a cooling fan of a Siemens inverter according to claim 1 is characterized in that: The DC output device includes PE2C, 2-F21, 2-F19 and DC-P. One end of PE2C is connected to the end directly opposite to A30, and the other end of PE2C is respectively connected to one end of 2-F21 and one end of 2-F19. The other end of 2-F21 and the other end of 2-F19 are both connected to one end of DC-P.

5. The circuit capable of monitoring and protecting a cooling fan of a Siemens inverter according to claim 1 is characterized in that: The auxiliary voltage component includes 1-P24, 1-M56, 1P24-1 and 2M-1, one end of the 1-P24 is connected to one end of the 1P24-1, one end of the 1-M56 is connected to one end of the 2M-1, and the other ends of the 1P24-1 and 2M-1 are both connected to the P24M end of A70.

6. The circuit capable of monitoring and protecting a cooling fan of a Siemens inverter according to claim 1, characterized in that: The power control component includes X41, X42, T2-CU-P24 and T2-CU-M, one end of the X41 is connected to the 1EPM1 end of the IPD, the other end of the X41 is connected to the 3M end of the IPD, one end of the X42 is connected to the 2EP end of the IPD, the other end of the X42 is connected to the 1P24L end of the IPD, one end of the T2-CU-P24 is connected to the 2P24L end of the IPD, and one end of the T2-CU-M is connected to the 4M end of the IPD.

7. The circuit capable of monitoring and protecting a cooling fan of a Siemens inverter according to claim 1, characterized in that: The control unit power supply comprises X400, X401 and X402, one end of X401, one end of X401 and one end of X402 are all connected to the DSA-1..8 end of CIM.

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