CN209860828U - Rotating equipment control device with brake resistor unit - Google Patents
Rotating equipment control device with brake resistor unit Download PDFInfo
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- CN209860828U CN209860828U CN201920455180.0U CN201920455180U CN209860828U CN 209860828 U CN209860828 U CN 209860828U CN 201920455180 U CN201920455180 U CN 201920455180U CN 209860828 U CN209860828 U CN 209860828U
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Abstract
The utility model provides a take rotary equipment controlling means of braking resistance unit, including rotary equipment, control converter, braking resistance unit, this rotary equipment mainly used drive load is rotatory, control converter main control rotary equipment's functioning speed, and the braking resistance unit is connected on the control converter for the energy that produces when the consumption motor braking. This take rotary equipment controlling means of brake resistance unit can realize that the energy that produces among the rotary equipment speed reduction or the parking process consumes to play effectual guard action to the converter part, the device can also effectively protect rotary equipment's safety, and simple structure, simple to operate, reliable and stable have important meaning in motor variable frequency speed control field.
Description
Technical Field
The utility model relates to a rotating equipment frequency conversion control field especially involves a rotating equipment controlling means of area braking resistance unit.
Background
The speed regulation performance based on the frequency converter is mature and reliable, and has the advantages of good speed regulation smoothness, large speed regulation range, small starting current and the like, and the application of the frequency converter in the field of speed regulation of rotating equipment such as motors is wider and wider, but the following braking problem is concerned more and more.
In a variable frequency speed control system, when a frequency converter drives a load motor to decelerate instantaneously or stop quickly, the rotating speed of a motor rotor cannot change suddenly due to inertia, the motor is in a regenerative power generation state at the moment, so that feedback current is generated, absorption of feedback electric energy is usually realized by a built-in capacitor of the frequency converter, but the capacity of the capacitor is limited, and the whole feedback electric energy cannot be absorbed. When the load inertia is particularly large or the frequency converter is braked frequently, the feedback electric energy is larger, the frequency converter needs to reduce the frequency quickly frequently, so that the energy generated in the stopping process is easy to damage and control the frequency converter and the motor, and the equipment cannot run normally.
In the existing control, a general rotating equipment control frequency converter is not connected with a brake unit.
SUMMERY OF THE UTILITY MODEL
The utility model provides a rotary equipment controlling means of area braking resistance unit for solve above technical problem. The purpose is to overcome the defects of the existing control scheme, and a braking resistance unit is used in the control of the rotating equipment which requires high-speed operation and short-time stability stopping to ensure that the energy generated in the stopping process is consumed, so that the equipment is effectively protected.
In order to achieve the above object, the present invention is implemented by the following technical measures:
a rotating equipment control device with a brake resistance unit specifically comprises a rotating equipment, a control frequency converter and the brake resistance unit. The rotating device may be a motor, primarily for driving a load. The control frequency converter mainly controls the running speed of the motor. The brake resistance unit comprises a brake part and a resistance part, and is connected with the control frequency converter, when the working condition changes, the motor generates feedback current, the direct current voltage rises, when the voltage reaches the conduction condition of the brake unit, the resistance part is switched on, the current is consumed in the form of heat energy through the resistance part, the rotating speed of the motor is reduced, the voltage is reduced, when the voltage is reduced to the switching-off value of the brake unit, the resistance unit is switched off, and no current flows through the resistance unit. The brake resistance unit balances voltage by continuously and repeatedly conducting and shutting off, and normal operation of the system is guaranteed.
The utility model discloses a theory of operation does for theory of operation: the frequency converter for controlling the motor is connected with a brake resistor unit, and when the rotating equipment runs at a high speed, the energy generated in the process of stopping or decelerating for a short time is consumed by the brake resistor. When the voltage reaches the conducting condition of the brake unit, the resistor part is switched on, the energy is quickly consumed, the rotating speed of the rotating equipment is reduced to a switching-off value, and the resistor unit is switched off. The device controls the continuous and repeated switching-on and switching-off of the brake resistance unit by detecting the voltage value of the frequency converter, so that the voltage is balanced, the safety of the motor is protected, and the normal operation of the system is ensured.
The utility model has the advantages that the safe operation of the motor is ensured; simple structure, convenient installation, stability and reliability.
Drawings
Fig. 1 is a schematic structural diagram of the present invention. Fig. 2 is a flow chart of the operation of the brake resistor unit.
Wherein, 1 is the motor, 2 is the control converter, 3 is the braking resistance unit, including braking part 31 and resistance part 32 two parts.
Detailed Description
In order to make the aforementioned and other objects, features and advantages of the invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
As shown in fig. 1, fig. 1 is a control device of a rotating apparatus with a brake resistance unit. The rotating equipment control device with the brake resistance unit comprises rotating equipment 1, a control frequency converter 2 and a brake resistance unit 3, wherein the rotating equipment is mainly used for driving a load to rotate, the control frequency converter 2 is mainly used for controlling the running speed of a motor 1, and the brake resistance unit 3 is connected to the control frequency converter and used for consuming energy generated during motor braking.
In this embodiment, the rotating device is a motor 1 for driving a load. The control frequency converter 2 controls the running speed of the motor 1. The brake resistance unit 3 comprises a brake part 31 and a resistance part 32, which are connected to the control frequency converter 2, when the working condition changes and the motor 1 generates feedback current, the direct current voltage rises, when the voltage reaches the brake unit conducting condition, the brake part 31 acts to switch on the resistance part 32, the current is consumed in the form of heat energy through the resistance part 32, the rotating speed of the motor 1 is reduced, the voltage is reduced, when the voltage is reduced to the brake unit switching-off value, the brake resistance unit 3 is switched off, and no current flows. The brake resistance unit 3 balances voltage by continuously and repeatedly conducting and shutting off, and normal operation of the system is guaranteed.
The utility model provides a take rotary equipment controlling means of braking resistance unit according to the type of device part index parameter selection braking resistance unit, through setting up opening and turn-off of turn-off value control braking resistance unit to this balanced voltage, protection motor safety.
The specific steps of controlling the brake resistance unit to act by setting the turn-off value are shown in fig. 2:
step 1, setting a voltage turn-off value U of a brake unit;
step 2, controlling the motor to operate by the frequency converter, and detecting a direct-current voltage value U1 of a bus of the frequency converter;
step 3, when the direct current voltage value U1 of the frequency converter bus is higher than the voltage turn-off value U of the brake unit, the resistance part 32 is switched on, the current is consumed in the form of heat energy through the resistance part 32, the rotating speed of the motor 1 is reduced, and the direct current voltage value U1 of the frequency converter bus is reduced;
and 4, when the direct-current voltage value U1 of the frequency converter bus is lower than the voltage turn-off value U of the brake unit, the brake unit is turned off.
Claims (7)
1. The rotating equipment control device with the brake resistance unit comprises rotating equipment, a control frequency converter and the brake resistance unit, wherein the rotating equipment is mainly used for driving a load to rotate, the control frequency converter is mainly used for controlling the running speed of the rotating equipment, and the brake resistance unit is used for consuming energy generated when a motor brakes.
2. The rotating equipment control device with the brake resistor unit according to claim 1, wherein the rotating equipment includes, but is not limited to, a steam turbine, a gas turbine, a compressor, a fan, a pump, a motor, and a generator.
3. The control device for a rotating apparatus with a brake resistor unit according to claim 1, wherein the brake resistor unit is built in or out depending on the power of the frequency converter.
4. The rotating equipment control device with the brake resistor unit according to claim 1, wherein the brake resistor unit includes a brake portion and a resistor portion.
5. The rotating equipment control device with the brake resistor unit as claimed in claim 1, wherein whether or not the resistor portion of the brake resistor unit is connected to the device is realized by the action of the brake portion.
6. The control device for a rotary apparatus having a brake resistor unit according to claim 1, wherein the resistor portion of the brake resistor unit is a ripple resistor or an aluminum alloy resistor.
7. The rotating equipment control device with the brake resistor unit according to claim 1, wherein the resistance value of the resistor part of the brake resistor unit is generally not accurately calculated, and the range of the resistance value is as follows:
R1<R<R2
R1＝UD/IM，R2＝2UD/IM
wherein R is partial resistance of the resistor, R1Is a minimum resistance value, R2Is the maximum resistance value, UDFor the brake resistance unit voltage turn-off value, IMIs the rated current of the rotating equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920455180.0U CN209860828U (en) | 2019-04-05 | 2019-04-05 | Rotating equipment control device with brake resistor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920455180.0U CN209860828U (en) | 2019-04-05 | 2019-04-05 | Rotating equipment control device with brake resistor unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209860828U true CN209860828U (en) | 2019-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920455180.0U Active CN209860828U (en) | 2019-04-05 | 2019-04-05 | Rotating equipment control device with brake resistor unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN209860828U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861589A (en) * | 2019-04-05 | 2019-06-07 | 江苏格博自动化设备有限公司 | A kind of the slewing control device and control method of band brake resistance unit |
-
2019
- 2019-04-05 CN CN201920455180.0U patent/CN209860828U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861589A (en) * | 2019-04-05 | 2019-06-07 | 江苏格博自动化设备有限公司 | A kind of the slewing control device and control method of band brake resistance unit |
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Legal Events
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Rotary equipment control device with braking resistance unit Effective date of registration: 20220112 Granted publication date: 20191227 Pledgee: Bank of Jiangsu Limited by Share Ltd. Wuxi New District sub branch Pledgor: JIANGSU GLOBAL AUTOMATION SYSTEM CO.,LTD. Registration number: Y2022320010019 |