A vibration motor amplitude control system

Abstract

The present invention discloses a vibration motor amplitude control system, including: a main unit, a control unit, and a PLC unit, wherein the main unit includes a frequency converter; the control unit includes a power control branch, a manual control branch, an automatic control branch, and a fault shutdown branch; the control system can change the output frequency of the frequency converter manually or automatically, thereby changing the vibration amplitude of the vibration motor, the PLC unit includes an S7‑224 programmable controller, and the frequency converter is an ABBACS550‑01 frequency converter. The present invention discloses a vibration motor amplitude control system, which has a simple electrical structure, can realize convenient adjustment of the vibration amplitude of the vibration motor, and at the same time reduces the failure rate of the amplitude control system, reduces maintenance costs, and improves production efficiency.

Description

Technical Field

[0001] The present invention belongs to the field of automatic control technology, and in particular relates to a vibration motor amplitude control system. Background Art

[0002] In the ore dressing operation, in order to ensure the smooth discharge of materials, a vibration motor is generally installed at the discharge port of the ore dressing machine silo, and the amplitude of the vibration motor is adjusted in real time according to the specific conditions of the discharge, that is, when the silo discharges materials unsmoothly, the amplitude of the vibration motor is increased to promote the falling of the ore materials, and when the silo discharges materials smoothly, the amplitude of the vibration motor needs to be reduced to avoid energy consumption and unnecessary noise and vibration. The early vibration motor was constructed by setting eccentric iron blocks at both ends of the ordinary motor. Whenever the amplitude of the motor needs to be adjusted, the operation of the ore dressing machine is stopped first, and then the eccentricity of the eccentric iron block is adjusted. The amplitude is changed by changing the eccentricity of the eccentric iron block. Due to the frequent adjustment, it is not only time-consuming and labor-intensive, but also seriously restricts the production efficiency.

[0003] In order to overcome the above defects, many mineral processing enterprises nowadays install variable frequency vibration motors at the discharge port of the ore dressing machine silo, and adjust the vibration amplitude of the vibration motor by changing the frequency of the driving power supply, which greatly saves time and manpower. However, the control system of this variable frequency vibration motor is relatively cumbersome, and the electrical structure is relatively complex. When used in the harsh environment of the ore dressing field, its failure rate is high and maintenance is frequent, which not only affects production efficiency, but also increases the cost of use. Summary of the invention

[0004] In order to solve the above-mentioned problems, the present invention proposes a vibration motor amplitude control system. The technical problem to be solved is: on the basis of the original frequency converter, vibration motor and related equipment, the original vibration motor amplitude control system is improved to achieve convenient adjustment of the vibration amplitude of the vibration motor and at the same time reduce the failure rate of the amplitude control system.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions, including:

[0006] The main unit, the control unit, and the PLC unit include a frequency converter, wherein the power input terminals L1, L2, and L3 of the frequency converter are connected to the normally open contacts of the AC contactor, the input terminals of the normally open contacts of the AC contactor are connected to the output terminals of the three-phase power switch, and the input terminals of the three-phase power switch are connected to the three-phase AC power supply AC380V; the power output terminals U, V, and W of the frequency converter are connected to the vibration motor, and the power terminal +24V of the frequency converter is respectively connected to the ROIC terminal of the frequency converter, the reset button, the first normally open contact of the mode conversion relay, and the first normally open contact of the start relay. The other end of the reset button is connected to the DI5 end of the inverter, the other end of the first normally open contact of the mode conversion relay is connected to the DI3 end of the inverter, the other end of the first normally open contact of the start relay is connected to the DI1 end of the inverter, the GND end and the DCOM end of the inverter are connected to the RO1B end of the inverter through the running relay, the power supply end +10V of the inverter is connected to the AGND1 end of the inverter through the potentiometer, and the adjustment end of the potentiometer is connected to the AI1 end of the inverter; the control unit includes a power control branch, a manual control branch, an automatic control branch, and a fault shutdown branch.

[0007] Furthermore, the power control branch includes a double-throw power switch connected to the AC220V power supply, the L end of the double-throw power switch is connected to the AC contactor, and the other end of the AC contactor is connected to the N end of the double-throw power switch.

[0008] Furthermore, the manual control branch includes a starting relay, one end of the starting relay is connected to the N end of the double-throw power switch, and the other end is connected to the normally closed contact of the fault relay, the other end of the normally closed contact of the fault relay is connected to the normally open button, the other end of the normally open button is connected to the normally closed button, the other end of the normally closed button is connected to contact ④ of the conversion switch, contact ③ of the conversion switch is connected to the L end of the double-throw power switch, the normally open button is connected in parallel to the second normally open contact of the starting relay, one end of the second normally open contact of the starting relay is connected to the starting indicator light, and the other end of the starting indicator light is connected to the N end of the double-throw power switch.

[0009] Furthermore, the automatic control branch includes a first branch and a second branch. The first branch includes a mode conversion relay, one end of the mode conversion relay is connected to the N end of the double-throw power switch, and the other end is connected to the contact ⑥ of the conversion switch, and is also connected to the second normally open contact of the mode conversion relay. The other end of the second normally open contact of the mode conversion relay is connected between the second normally open contact of the start relay and the start indicator light, and the contact ⑤ of the conversion switch is connected to the L end of the double-throw power switch; the second branch includes a terminal A1 connected to the L end of the double-throw power switch, and a terminal A2 is connected to the regulating control relay, and the other end of the regulating control relay is connected to the N end of the double-throw power switch. The terminals A1 and A2 are connected one-to-one with the two ends of the normally open contact of the silo discharge port induction relay.

[0010] Furthermore, the fault shutdown branch includes a terminal B1 connected to the L end of the double-throw power switch, a terminal B2 connected to a fault relay, the other end of the fault relay is connected to the N end of the double-throw power switch, the fault relay is connected in parallel to a fault indicator light, and the terminals B1 and B2 are connected to the R03B and R03C terminals of the inverter one by one.

[0011] Furthermore, a frequency indicator is connected between the A01 terminal and the AGND2 terminal of the frequency converter, and a current indicator is connected between the A02 terminal and the AGND2 terminal of the frequency converter.

[0012] Furthermore, the PLC unit includes a PLC controller, the 1M terminal of the PLC controller is grounded and connected to the negative pole of the +24V power supply, the positive pole of the +24V power supply is connected to the third normally open contact of the start relay, the third normally open contact of the mode conversion relay, the auxiliary normally open contact of the three-phase power switch, the normally open contact of the fault relay, and the normally open contact of the regulating control relay, the other end of the third normally open contact of the start relay is connected to the normally open contact of the running relay, the other end of the normally open contact of the running relay is connected to the 10.0 terminal of the PLC controller, and the other end of the third normally open contact of the mode conversion relay is connected The other end of the auxiliary normally open contact of the three-phase power switch is connected to the auxiliary normally open contact of the double-throw power switch, and the other end of the auxiliary normally open contact of the double-throw power switch is connected to the 10.2 end of the PLC controller. The other end of the normally open contact of the fault relay is connected to the 10.3 end of the PLC controller, and the other end of the normally open contact of the regulating control relay is connected to the 10.4 end of the PLC controller; the 1L end of the PLC controller is connected to the +24V power supply; the Q0.0 end of the PLC controller is connected to the AGND end of the inverter, and its Q0.1 end is connected to the AI2 end of the inverter.

[0013] Preferably, the PLC controller is an S7-224 programmable controller.

[0014] Preferably, the frequency converter is an ABB ACS550-01 frequency converter.

[0015] The present invention discloses a vibration motor amplitude control system, which has a simple electrical structure and can realize convenient adjustment of the vibration amplitude of the vibration motor, while reducing the failure rate of the amplitude control system, lowering maintenance costs and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the circuit principle diagram of the main unit of the present invention.

[0017] Figure 2 It is a circuit schematic diagram of the control unit of the present invention.

[0018] Figure 3It is the circuit principle diagram of the PLC unit of the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings to facilitate a clearer understanding for those skilled in the art.

[0020] like Figure 1 As shown, the present invention includes:

[0021] The main unit, the control unit, and the PLC unit are provided. The main unit includes a frequency converter 1. The power input terminals L1, L2, and L3 of the frequency converter are connected to the normally open contact 2KM-1 of the AC contactor. The input terminal of the normally open contact of the AC contactor is connected to the output terminal of the three-phase power switch 2QF1. The input terminal of the three-phase power switch is connected to the three-phase AC power supply AC380V. The power output terminals U, V, and W of the frequency converter are connected to the vibration motor M. The power terminal +24V of the frequency converter is respectively connected to the ROIC terminal of the frequency converter, the reset button SBR, the first normally open contact 2KA1-1 of the mode conversion relay, and the first normally open contact 2KA1-2 of the start relay. A normally open contact 2K1-1, the other end of the reset button is connected to the inverter DI5 end, the other end of the first normally open contact of the mode conversion relay is connected to the inverter DI3 end, the other end of the first normally open contact of the start relay is connected to the inverter DI1 end, the GND end and DCOM end of the inverter are connected to the inverter RO1B end through the running relay 2KR, the inverter power supply end +10V is connected to the inverter AGND1 end through the potentiometer RP, and the adjustment end of the potentiometer is connected to the inverter AI1 end; the control unit includes a power control branch, a manual control branch, an automatic control branch, and a fault shutdown branch.

[0022] Further, such as Figure 2 As shown, the power control branch includes a double-throw power switch 2QF2 connected to the power supply AC220V, the L end of the double-throw power switch is connected to the AC contactor 2KM, and the other end of the AC contactor is connected to the N end of the double-throw power switch.

[0023] Further, such as Figure 2 As shown, the manual control branch includes a starting relay 2K1, one end of the starting relay is connected to the N end of the double-throw power switch, and the other end is connected to the normally closed contact KF-1 of the fault relay, the other end of the normally closed contact of the fault relay is connected to the normally open button SB1, the other end of the normally open button is connected to the normally closed button SB2, the other end of the normally closed button is connected to the contact ④ of the conversion switch ISA, the contact ③ of the conversion switch is connected to the L end of the double-throw power switch, the normally open button is connected in parallel to the second normally open contact 2K1-2 of the starting relay, one end of the second normally open contact of the starting relay is connected to the starting indicator light D1, and the other end of the starting indicator light is connected to the N end of the double-throw power switch.

[0024] Further, such as Figure 2 As shown, the automatic control branch includes a first branch and a second branch. The first branch includes a mode conversion relay 2KA1, one end of the mode conversion relay is connected to the N end of the double-throw power switch, and the other end is connected to the contact ⑥ of the conversion switch, and is also connected to the second normally open contact 2KA1-2 of the mode conversion relay. The other end of the second normally open contact of the mode conversion relay is connected between the second normally open contact of the start relay and the start indicator light, and the contact ⑤ of the conversion switch is connected to the L end of the double-throw power switch; the second branch includes a terminal A1 connected to the L end of the double-throw power switch, and a terminal A2 is connected to the regulating control relay 2KA2. The other end of the regulating control relay is connected to the N end of the double-throw power switch. The terminals A1 and A2 are connected one-to-one with the two ends of the normally open contact of the silo discharge port induction relay.

[0025] Further, such as Figure 2 As shown, the fault shutdown branch includes a terminal B1 connected to the L end of the double-throw power switch, a terminal B2 connected to a fault relay KF, the other end of the fault relay is connected to the N end of the double-throw power switch, the fault relay is connected in parallel to the fault indicator light D2, and the terminals B1 and B2 are connected to the R03B end and the R03C end of the inverter in a one-to-one correspondence.

[0026] Further, such as Figure 1 As shown, a frequency indicator PV is connected between the A01 terminal and the AGND2 terminal of the frequency converter, and a current indicator PA is connected between the A02 terminal and the AGND2 terminal of the frequency converter.

[0027] Further, such as Figure 3As shown, the PLC unit includes a PLC controller 2, the 1M terminal of the PLC controller is grounded and connected to the negative pole of the +24V power supply, the positive pole of the +24V power supply is simultaneously connected to the third normally open contact 2K1-3 of the start relay, the third normally open contact 2KA1-3 of the mode conversion relay, the auxiliary normally open contact 2QF1-1 of the three-phase power switch, the normally open contact KF-2 of the fault relay, and the normally open contact 2KA2-1 of the regulating control relay, the other end of the third normally open contact of the start relay is connected to the normally open contact 2KR-1 of the running relay, the other end of the normally open contact of the running relay is connected to the 10.0 terminal of the PLC controller, the mode conversion relay The other end of the third normally open contact is connected to the 10.1 terminal of the PLC controller, the other end of the auxiliary normally open contact of the three-phase power switch is connected to the auxiliary normally open contact 2QF2-1 of the double-throw power switch, the other end of the auxiliary normally open contact of the double-throw power switch is connected to the 10.2 terminal of the PLC controller, the other end of the normally open contact of the fault relay is connected to the 10.3 terminal of the PLC controller, and the other end of the normally open contact of the regulating control relay is connected to the 10.4 terminal of the PLC controller; the 1L terminal of the PLC controller is connected to the +24V power supply; the Q0.0 terminal of the PLC controller is connected to the AGND terminal of the inverter, and its Q0.1 terminal is connected to the AI2 terminal of the inverter.

[0028] Preferably, the PLC controller is an S7-224 programmable controller.

[0029] Preferably, the frequency converter is an ABB ACS550-01 frequency converter.

[0030] Working process of the present invention:

[0031] Manual control mode

[0032] Close the three-phase power switch 2QF1 and the double-throw power switch 2QF2, the AC contactor 2KM is energized, the normally open contact 2KM-1 of the AC contactor is closed, the power input terminals L1, L2, and L3 of the inverter are energized, and the inverter is in a ready state. Set the conversion switch ISA to the "manual" position, and the contacts ③ and ④ of the conversion switch are closed. Press the normally open button SB1, the start relay 2K1 is energized, the start indicator D1 is on, and the first normally open contact 2K1-1 of the start relay is closed. The inverter DI1 terminal is at a high level, and the inverter is in a starting state. At this time, adjust the potentiometer RP to make the voltage at the inverter AI1 terminal between 0 and 100. —10V, so that the power frequency output by the inverter power output terminals U, V, W changes, thereby changing the vibration amplitude of the vibration motor M; at the same time, the second normally open contact 2K1-2 of the starting relay is closed to protect the starting relay; pressing the normally closed button SB2 can stop the operation of the inverter; when the inverter fails, the R03B and R03C terminals of the inverter are connected, the wiring terminals B1 and B2 in the fault shutdown branch are connected, the fault relay KF is energized, the fault indicator D2 is on, and the normally closed contact KF-1 of the fault relay is disconnected, thereby releasing the starting relay and stopping the inverter.

[0033] Automatic working mode

[0034] Close the three-phase power switch 2QF1 and the double-throw power switch 2QF2, the AC contactor 2KM is energized, the AC contactor normally open contact 2KM-1 is closed, the power input terminals L1, L2, and L3 of the inverter are energized, and the inverter is in a ready state. At the same time, the three-phase power switch auxiliary normally open contact 2QF1-1 and the double-throw power switch auxiliary normally open contact 2QF2-1 are closed, giving a "power-on" signal to the PLC controller 10.2 terminal, setting the transfer switch ISA to the "automatic" position, the contacts ⑤ and ⑥ of the transfer switch are closed, the mode transfer relay 2KA1 is energized, and the first normally open contact 2KA1-1 of the mode transfer relay is closed. The inverter DI3 terminal is at a high level, the third normally open contact 2KA1-3 of the mode conversion relay is closed, and an "automatic" signal is given to the PLC controller 10.1 terminal. The inverter is in automatic working mode, the second normally open contact 2KA1-2 of the mode conversion relay is closed, the start relay is energized, the start indicator light is on, the first normally open contact of the start relay is closed, the inverter DI1 is high level, the inverter is in the starting state, the running relay 2KR connected to the inverter is energized, and the running relay normally open contact 2KR-1 is closed. Since the third normally open contact of the start relay is in a closed state, the PLC controller 10.0 terminal receives an " At this time, if the induction relay of the silo discharge port detects that the discharge port is blocked, the normally open contact of the induction relay is closed, the terminals A1 and A2 in the control unit are connected, the regulating control relay 2KA2 is energized, the normally open contact 2KA2-1 of the regulating control relay is closed, and the PLC controller 10.4 terminal receives a "speed regulation" signal. The output terminals Q0.0 and Q0.1 of the PLC controller input a linearly rising regulating voltage to the input terminals AI2 and AGND of the inverter, so that the power supply frequency output by the power output terminals U, V, and W of the inverter changes, thereby gradually increasing the vibration amplitude of the vibration motor M. When the inverter fails, the R03B and R03C terminals of the inverter are connected, the terminals B1 and B2 in the fault shutdown branch are connected, the fault relay KF is energized, the fault indicator D2 is on, and the normally closed contact KF-1 of the fault relay is disconnected, thereby releasing the start relay and stopping the inverter. At the same time, the 10.3 terminal of the PLC controller receives a "fault" signal, and the PLC controller stops working.

[0035] The frequency indicator (PV) and current indicator (PA) are used to monitor the operating frequency and operating current of the inverter respectively.

[0036] The present invention discloses a vibration motor amplitude control system, which has a simple electrical structure and can realize convenient adjustment of the vibration amplitude of the vibration motor, while reducing the failure rate of the amplitude control system, lowering maintenance costs and improving production efficiency.

Claims

1. A vibration motor amplitude control system, comprising a main unit, a control unit, and a PLC unit, wherein the main unit comprises a frequency converter (1), wherein power input terminals L1, L2, and L3 of the frequency converter are connected to normally open contacts (2KM-1) of an AC contactor, wherein the input terminal of the normally open contacts of the AC contactor is connected to the output terminal of a three-phase power switch (2QF1), wherein the input terminal of the three-phase power switch is connected to a three-phase AC power supply of AC380V; and power output terminals U, V, and W of the frequency converter are connected to a vibration motor (M), wherein: The inverter power supply terminal +24V is respectively connected to the inverter ROIC terminal, the reset button (SBR), the first normally open contact of the mode conversion relay (2KA1-1), and the first normally open contact of the start relay (2K1-1). The other end of the reset button is connected to the inverter DI5 terminal, the other end of the first normally open contact of the mode conversion relay is connected to the inverter DI3 terminal, and the other end of the first normally open contact of the start relay is connected to the inverter DI1 terminal. The GND terminal and DCOM terminal of the inverter are connected to the inverter RO1B terminal through the running relay (2KR). The inverter power supply terminal +10V is connected to the inverter AGND1 terminal through the potentiometer (RP). The adjustment end of the potentiometer is connected to the AI1 end of the frequency converter; the control unit includes a power control branch, a manual control branch, an automatic control branch, and a fault shutdown branch; the power control branch includes a double-throw power switch (2QF2) connected to the AC220V power supply, the L end of the double-throw power switch is connected to the AC contactor (2KM), and the other end of the AC contactor is connected to the N end of the double-throw power switch; the manual control branch includes a start relay (2K1), one end of the start relay is connected to the N end of the double-throw power switch, and the other end is connected to the normally closed contact of the fault relay (KF-1), and the other end of the normally closed contact of the fault relay is connected to the normally open button (SB1), The other end of the normally open button is connected to the normally closed button (SB2), the other end of the normally closed button is connected to the contact 4 of the conversion switch (ISA), the contact 3 of the conversion switch is connected to the L end of the double-throw power switch, the normally open button is connected in parallel to the second normally open contact (2K1-2) of the start relay, one end of the second normally open contact of the start relay is connected to the start indicator light (D1), and the other end of the start indicator light is connected to the N end of the double-throw power switch; the PLC unit comprises a PLC controller (2), the 1M end of the PLC controller is grounded and connected to the negative pole of the +24V power supply, and the positive pole of the +24V power supply is connected to the third normally open contact (2K1-3) of the start relay, the third normally open contact (2KA1-3) of the mode conversion relay, the auxiliary normally open contact (2QF1-1) of the three-phase power switch, the normally open contact (KF-2) of the fault relay, and the regulating control relay. The other end of the third normally open contact of the start relay is connected to the normally open contact of the running relay (2KR-1), and the other end of the normally open contact of the running relay is connected to the 10.0 end of the PLC controller. The other end of the third normally open contact of the mode conversion relay is connected to the 10.1 end of the PLC controller. The other end of the auxiliary normally open contact of the three-phase power switch is connected to the auxiliary normally open contact of the double-throw power switch (2QF2-1), and the other end of the auxiliary normally open contact of the double-throw power switch is connected to the 10.2 end of the PLC controller. The other end of the normally open contact of the fault relay is connected to the 10.3 end of the PLC controller. The other end of the normally open contact of the regulating control relay is connected to the 10.4 end of the PLC controller; the 1L end of the PLC controller is connected to the +24V power supply; Q0.The 0 terminal is connected to the inverter AGND terminal, and its Q0.1 terminal is connected to the inverter AI2 terminal.

2. The vibration motor amplitude control system according to claim 1, characterized in that: The automatic control branch includes a first branch and a second branch. The first branch includes a mode conversion relay (2KA1). One end of the mode conversion relay is connected to the N end of the double-throw power switch, and the other end is connected to the contact 6 of the conversion switch, and is also connected to the second normally open contact (2KA1-2) of the mode conversion relay. The other end of the second normally open contact of the mode conversion relay is connected between the second normally open contact of the start relay and the start indicator light. The contact 5 of the conversion switch is connected to the L end of the double-throw power switch. The second branch includes a terminal A1 connected to the L end of the double-throw power switch, and the terminal A2 is connected to the regulating control relay (2KA2). The other end of the regulating control relay is connected to the N end of the double-throw power switch. The terminals A1 and A2 are connected to the two ends of the normally open contact of the silo discharge port induction relay in a one-to-one correspondence.

3. The vibration motor amplitude control system according to claim 2, characterized in that: The fault shutdown branch includes a terminal B1 connected to the L end of the double-throw power switch, a terminal B2 connected to a fault relay (KF), the other end of the fault relay connected to the N end of the double-throw power switch, the fault relay is connected in parallel to a fault indicator light (D2), and the terminals B1 and B2 are connected to the R03B terminal and the R03C terminal of the inverter in a one-to-one correspondence.

4. The vibration motor amplitude control system according to claim 3, characterized in that: A frequency indicator (PV) is connected between the A01 terminal and the AGND2 terminal of the frequency converter, and a current indicator (PA) is connected between the A02 terminal and the AGND2 terminal of the frequency converter.

5. The vibration motor amplitude control system according to claim 4, characterized in that: The PLC controller is a S7-224 programmable controller.

6. The vibration motor amplitude control system according to claim 5, characterized in that: The frequency converter is ABBACS550-01 frequency converter.

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