Brake device for off-line packaging variable-frequency conveying roller way

Abstract

The invention discloses an off-line packaging variable-frequency conveying roller way braking device, which is characterized in that an 80-ohm braking resistor and a braking unit are additionally arranged in a variable-frequency cabinet of an off-line packaging machine, so that regenerative electric energy of a motor is absorbed, and excessive energy fed back by the motor is reduced. The invention effectively solves the problem that the power unit detects the overvoltage of the direct-current bus and triggers the protection alarm of the frequency converter due to excessive feedback energy of the motor.

Description

Technical Field

[0001] The invention relates to a field, and in particular to an off-line packaging variable frequency conveying roller brake device. Background Art

[0002] During the commissioning and use of the offline baler of the steel enterprise, it was found that the offline baling conveyor roller frequently reported F30002 (DC bus overvoltage) fault during use, affecting the production rhythm. After on-site tracking observation and analysis, the offline baling conveyor roller inverter cabinet was not equipped with a brake device. During the instantaneous switching of the roller forward and reverse rotation, the motor fed back too much energy during the speed reduction process. The inverter did not consume too much energy. The power unit detected the DC bus overvoltage, which triggered the inverter to report F30002 (DC bus overvoltage) fault.

[0003] Therefore, it is necessary to develop a new type of offline packaging variable frequency conveyor roller brake device to overcome the above problems. Summary of the invention

[0004] Purpose of the invention: In view of the shortcomings and defects of the prior art, the present invention provides an offline packaging variable frequency conveyor roller brake device, which effectively solves the problem of excessive motor feedback energy, the power unit detecting DC bus overvoltage, and triggering the inverter protection alarm.

[0005] Technical solution: An offline packaging frequency conversion conveyor roller brake device of the present invention is characterized in that an 80-ohm brake resistor and a brake unit are installed in the frequency conversion cabinet of the offline packaging machine to absorb the regenerative electric energy of the motor and reduce the excessive energy fed back by the motor.

[0006] Wherein, the incoming line terminal of the braking unit is connected between the DC+ and DC- terminals of the frequency converter, and the output terminal of the braking unit is connected to the braking resistor.

[0007] Wherein, the frequency conversion cabinet is a frequency conversion cabinet of a frequency conversion conveyor roller of an offline baler.

[0008] Wherein, the frequency converter, motor, brake unit and brake resistor are located in the frequency converter cabinet.

[0009] Wherein, the frequency converter is provided with a rectifier and an inverter.

[0010] Wherein, the braking unit is provided with a level detector.

[0011] Wherein, the braking resistor is provided with an overheat protection node.

[0012] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: the present invention effectively solves the problem that the power unit detects DC bus overvoltage due to excessive motor feedback energy, triggering the inverter protection alarm. The present invention enables the offline packaging conveyor roller to effectively and smoothly brake and stop; protects the inverter; reduces the frequency of offline packaging conveyor roller failures and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention;

[0014] In the figure, 1 is a frequency converter; 11 is a rectifier; 12 is an inverter; 2 is a motor; 3 is a brake unit; 31 is a level detector; 4 is a brake resistor; and 41 is an overheat protection node. DETAILED DESCRIPTION

[0015] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0016] The offline packaging variable frequency conveyor roller brake device of the present invention is provided with an 80 ohm brake resistor 4 and a brake unit 3 in the frequency conversion cabinet of the offline packaging machine to absorb the regenerative electric energy of the motor 2 and reduce the excessive energy fed back by the motor 2. The input terminal of the brake unit 3 is connected between the DC+ and DC- terminals of the frequency converter 1, and the output terminal of the brake unit 3 is connected to the brake resistor 4.

[0017] The frequency conversion cabinet of the present invention is a frequency conversion cabinet for a frequency conversion conveyor roller of an offline baler. A frequency converter 1, a motor 2, a brake unit 3, and a brake resistor 4 are located in the frequency conversion cabinet. The frequency converter 1 is provided with a rectifier 11 and an inverter 12. The brake unit 3 is provided with a level detector 31. The brake resistor 4 is provided with an overheat protection node 41.

[0018] The present invention absorbs the regenerative electric energy of the motor through the braking resistor, reduces the excessive energy fed back by the motor, and effectively solves the inverter protection fault triggered by the excessive energy fed back. The present invention effectively solves the problem that the power unit detects the DC bus overvoltage due to the excessive energy fed back by the motor, triggering the inverter protection alarm. The present invention enables the offline packaging conveyor roller to effectively and smoothly brake and stop; protects the inverter; reduces the frequency of offline packaging conveyor roller faults and improves production efficiency.

Claims

1. An offline packaging variable frequency conveyor roller brake device, characterized in that: An 80-ohm braking resistor (4) and a braking unit (3) are installed in the frequency conversion cabinet of the offline baler to absorb the regenerative electric energy of the motor (2) and reduce the excessive energy fed back by the motor (2).

2. The off-line packaging variable frequency conveying roller brake device according to claim 1 is characterized in that: The input terminal of the braking unit (3) is connected between the DC+ and DC- terminals of the frequency converter (1), and the output terminal of the braking unit (3) is connected to the braking resistor (4).

3. The off-line packaging variable frequency conveying roller brake device according to claim 1 is characterized in that: The frequency conversion cabinet is a frequency conversion cabinet of a frequency conversion conveying roller table of an offline baler.

4. The off-line packaging variable frequency conveying roller brake device according to claim 3 is characterized in that: The frequency converter (1), motor (2), brake unit (3) and brake resistor (4) are located in a frequency converter cabinet.

5. The off-line packaging variable frequency conveying roller brake device according to claim 2 is characterized in that: The frequency converter (1) is provided with a rectifier (11) and an inverter (12).

6. The off-line packaging variable frequency conveying roller brake device according to claim 5 is characterized in that: The braking unit (3) is provided with a level detector (31).

7. The off-line packaging variable frequency conveying roller brake device according to claim 6 is characterized in that: The braking resistor (4) is provided with an overheat protection node (41).

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