KR101731281B1 - Valuation method and system for characteristics and durability of retarder - Google Patents

Abstract

The present invention relates to an evaluation system to verify durability and performance of a retarder, measuring a voltage and a current of a retarder as well as a braking force, a shaft revolution per minute (RPM), and a temperature of a retarder to be evaluated so as to detect and analyze electrically and mechanically synchronized data such as LC resonance effect, phase equilibrium, etc.; and an evaluation method thereof. According to the present invention, the method comprises: (a) an evaluation reference setting step of setting an RPM of a motor to rotate the retarder to be evaluated, and an on/off cycle and the number of repetition of the retarder; (b) a step of operating the motor to rotate the retarder to be evaluated; (c) a step of operating the retarder when the RPM of the motor satisfies a set RPM and temperature condition; (d) a step of stopping the retarder when the operated retarder reaches the off cycle; (e) a step of analyzing and determining whether or not the retarder is normal; (f) a step of interrupting and terminating evaluation when the retarder is abnormal, storing analysis data when the retarder is normal; and (g) a step of being terminated when the number of retarder evaluation reaches a set number, and moving to the motor operating step to perform again the evaluation of the retarder when the number of retarder evaluation does not reach the set number.

Description

TECHNICAL FIELD The present invention relates to an evaluation system for evaluating durability and performance of a retarder,

The present invention relates to an evaluation system for evaluating the durability and performance of a retarder and a method of evaluating the same. More specifically, the present invention relates to an evaluation system for evaluating the durability and performance of a retarder, And can detect and analyze electrically and mechanically synchronized data such as LC resonance phenomenon and phase balance.

Generally, in the case of a large vehicle such as a bus or a truck, the braking load is very large. In addition, conventional brakes using friction due to frequent braking on downhill or long distance travel have a problem of braking safety due to brake rupture and fade phenomenon, and sudden braking in overload or over-speed state is caused by increase of heat load of brake, The friction material and the drum life. Therefore, these large-sized vehicles are essentially equipped with auxiliary brakes that share the braking force.

Examples of the auxiliary brakes include Jake Brake, Exhaust Brake, Compression Brake, Retarder Brake, etc. Since the drive shaft is restrained by using an electromagnetic field without a contact surface, (Or electromagnetic) retarder, which is easy to maintain and durable, and which can increase fuel efficiency in hybrid vehicles, fuel cell vehicles or electric vehicles. A repulsive retarder is used.

On the other hand, there is a system for verifying the durability and performance of the retarder, but it is judged that the braking force of the retarder to be evaluated, the shaft rotation speed, And the failure rate is increased.

Korean Patent Registration No. 10-1239414 (entitled "Electronically Erasable Retarder," issued on March 3, 2013) Korean Patent Registration No. 10-1487093 (entitled "Regenerative Braking Mode Control Apparatus and Method for Hybrid Vehicle," issued on Feb. 2, 2014) Korean Patent Laid-Open Publication No. 10-2013-0137097 (entitled "Method of Operation of Regenerative Braking System of Vehicle and Control Apparatus for Regenerative Braking System of Vehicle"

The present invention detects electrically and mechanically synchronized data such as LC resonance phenomenon and phase balance outside the final output by measuring the voltage and current of the retarder (RTD) as well as the braking force, shaft rotational speed and temperature of the retarder And an evaluating system for verifying the durability and performance of the retarder that can be analyzed and an evaluation method thereof.

The evaluation system for verifying the durability and performance of the retarder of the present invention comprises: a retarder installed on a base; A motor and a drive shaft installed on the base and rotating the rotor of the retarder; An infrared ray temperature sensor for detecting the drum temperature of the retarder; Three current sensors for detecting the three-phase current of the retarder; Three voltage sensors for detecting the three-phase voltage of the retarder; A coil temperature sensor for detecting a coil temperature of the retarder; A rotational speed and braking torque detector and controller for detecting the rotational speed and braking torque of the retarder; Wherein the current sensor, the voltage sensor and the coil temperature sensor are connected to an input of a bridge, the input / output of the controller is connected to the input of the bridge, the rotational speed and the braking torque detector are connected to the input of the controller, A DAQ is connected to an output terminal of the bridge, and a monitor having a microcomputer, a PC, or a PLC is connected to a rear end of the DAQ.

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The motor may be an inverter motor, a stepping motor, or a servo motor.

And a clutch and braking means provided on the drive shaft.

The retarder is supported by a support means and is configured to be slidable in a direction opposite to the direction of the drive shaft by an LM guide. When the evaluation position of the retarder is determined, fixing means for fixing the retarder .

The three-phase voltage waveform detected by the three voltage sensors is output to the upper left corner of the screen, the three-phase current waveform detected by the three current sensors is outputted to the upper right of the screen, In the lower part, the rotation torque and the rotation speed graph of the retarder are output, the evaluation count input / output graph is displayed at the lower right of the screen, the data storage path is displayed at the upper right of the screen, and the motor rotation speed and the storage button The voltage (V), the current (A), the effective voltage (Vrms), the effective current (Irms) and the DC link voltage for the A phase B phase are displayed at the lower end of the storage button, The gate and braking torque indications are displayed respectively, the coil temperature is indicated by a bar graph and numerical value at the bottom of the rotational speed indicator, and the drum temperature at the bottom of the braking torque indicator is indicated by a bar graph and numerals And a stop button STOP is displayed at the lower end of the rotation speed indicator and the braking torque indicator.

An evaluation method for durability and performance verification of the retarder of the present invention includes a retarder installed on a base, a motor and a drive shaft installed on the base and rotating the rotor of the retarder, Phase current of the retarder, three voltage sensors for detecting the three-phase voltage of the retarder, a coil temperature sensor for detecting the coil temperature of the retarder, A rotation speed detecting means for detecting a rotation speed and a braking torque of the retarder, a braking torque detector and a controller, an input terminal of the bridge to which the current sensor, the voltage sensor and the coil temperature sensor are connected, A DAQ connected to an output of the bridge, and a DAQ connected to a rear end of the DAQ; A method for evaluating the durability and performance of a retarder comprising a computer and a monitor equipped with either a PC or a PLC, the evaluating method comprising: a) an evaluation criterion setting step of setting a rotation speed of the motor for rotating the retarder to be evaluated, an ON / OFF period and a repetition number of the retarder; b) driving a motor for rotating the retarder to be evaluated; c) operating the retarder if the rotational speed of the motor satisfies the set rotational speed and temperature condition; d) stopping when the retarder in operation reaches an OFF period; e) analyzing and determining whether the retarder is normal; f) stopping and terminating the evaluation if the retarder is bad and storing analysis data if the retarder is normal; g) ending when the number of retarder evaluations has reached the set number of times, and moving to the motor drive stage and performing the re-evaluation of the retarder if the number of retasurer evaluations does not reach the set number of times; . ≪ / RTI >

In the step e) of analyzing and determining whether the retarder is normal, the three-phase voltage and the three-phase current are measured in the event of a failure of the retarder, thereby confirming the breakage occurrence portion of the retarder.

If the retarder is defective, the evaluation is terminated and the evaluation is terminated. If the temperature condition of the retarder exceeds the upper limit set temperature, the braking torque exceeds the set torque, The retarder evaluation can be stopped.

The present invention can synchronize data such as the rotational speed, the braking torque, the voltage, the current, and the temperature detected (measured) in the retarder 3 and can verify the durability and initial performance of the retarder 3 , It is possible to detect and correct the braking torque fluctuation phenomenon according to the phase unbalance, and it is possible to construct a torque map for the control.

The present invention is effective in preventing damage to the system through temperature feedback of the retarder system by detecting not only the braking force, the rotational speed of the drive shaft, the pressure, the coil temperature, and the drum temperature but also the voltage and current, have.

The present invention is characterized in that the coil temperature of the retarder 3 exceeds 180 DEG C, the drum temperature of the retarder 3 exceeds 550 DEG C, the braking torque is 1500 Nm or more, or the rotational speed is higher than a predetermined rotational speed (rpm) In such a case, it is a very useful invention that has a function of measuring a three-phase voltage and a three-phase current to check the occurrence of a breakage and to deal with defects.

Fig. 1: System configuration photograph of one example of the present invention.
2 is a photograph of a voltage sensor installation according to an embodiment of the present invention.
3 is a photograph of a current sensor installation according to an embodiment of the present invention.
Fig. 4 is a photograph of the infrared sensor of the present invention.
5 is an evaluation circuit block diagram showing an example of the present invention.
6 is a flowchart of a retarder evaluation process (flowchart) shown as an example of the present invention.
Fig. 7: Screen displayed on the monitor shown as one example of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to facilitate a person skilled in the art to easily carry out the technical idea of the present invention. . In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Fig. 1 is a diagram showing the configuration of an evaluation system 1 for verifying the durability and performance of the retarder shown in the embodiment of the present invention. The retarder 3 and the retarder 3 of the retarder 3, An infra-red temperature sensor 6 for indirectly detecting the drum temperature of the retarder 3, a motor 4 and a drive shaft 5 for rotating the retarder 3 At least one current sensor 7 for detecting a current, a voltage sensor 8 for detecting the voltage of the retarder 3, a coil temperature sensor 9 for detecting the temperature of the retarder 3 coil, A braking torque detector 10 for detecting a rotational speed of the retarder 3 and a braking torque,

When the retarder 3 is three-phase, the current sensor 7 and the voltage sensor 8 are disposed adjacent to or electrically connected to the next conductor, which is installed three at a time as shown in Figs. 2 and 3, Voltage and phase current, respectively.

The motor 2 may be an inverter motor, a stepping motor or a servo motor. The drive shaft 5 may include a clutch 12 and / (3) The rotor can be suddenly braked at the emergency stop.

The retarder 3 is supported on the base 2 for evaluation time by a supporting means 14 such as a jig or a clamp and is slid in the direction opposite to the direction of the drive shaft 5 by using the LM guide 15, So that the driving shaft 5 can be easily engaged or disengaged. When the position of the retarder 3 is determined, it is fixed by the fixing means so as not to flow or move during the evaluation time.

The current sensor 8, the voltage sensor 8 and the coil temperature sensor 9 are connected to the input terminal of the bridge 17 using a BNC cable or the like which is easy to connect to the controller 11. The controller 11 is also connected to the bridge 17 , And the rotational speed and the braking torque detector 10 are connected to the input of the controller 11. [

A DAQ for collecting various data of the retarder 3 is connected to the output terminal of the bridge 17 and is monitored by a monitor M connected to the rear end of the DAQ and equipped with a microcomputer, An infrared temperature sensor 6 for indirectly detecting the drum temperature of the retarder 3 is connected to the input / output of the monitor M, for example, the USB terminal, as shown in Fig. The controller 11 may include a microcomputer, a PC, and a PLC.

The retarder 3 to be verified may be coupled to the support means 14 and then the LM guide 15 may be used to drive the drive shaft 5) so as to axially couple the rotor of the retarder 3 and the drive shaft 5 and fix the retarder 3 so that the retarder 3 does not flow or move during the evaluation time by the fixing means, The sensor 8 and the coil temperature sensor 9 are evaluated using an evaluation program in a state where the retarder 3, the rotational speed, the braking torque detector 10, the infrared temperature sensor 6, and the like are installed.

When the motor 4 is operated, the drive shaft 5 rotates, the rotor of the retarder 3 rotates for a set time, and the phase current detected through the current sensor 8 and the phase current detected by the voltage sensor 8 The phase voltage and the temperature value detected by the coil temperature sensor 9 are monitored while being inputted and displayed on the monitor M via the BNC cable and the DAQ and are detected by the rotational speed and the retarder by the braking torque detector 10 3 and the braking torque are input and displayed on the monitor M via the controller 11, and the retarder 3 is controlled at the speed set by the program.

The DAQ (Data Acquisition) can take the physical phenomenon (data) of the retarder 3 to a microcomputer (PC), a PLC or the like, and process it. (For example, Measurement & Automation Explorer (MAX)) for testing and setting hardware, an application for generating an application, transmitting commands to the driver, collecting data, (E.g., LabVIEW), and the like.

FIG. 5 is a flowchart of an evaluation method for verifying retarder durability and performance shown in one example of the present invention. A criterion for durability and performance evaluation of the evaluating target retarder 3 is set. An evaluation reference setting step S10 for setting the rotational speed of the motor 4 that rotates the rotor (rotation system) of the evaluation subject retarder, the ON / OFF (OFF) period and the number of repetition of the retarder, and the like (S12) of determining whether the rotational speed (RPM) of the motor (4) reaches a set reference and satisfies a temperature condition (S12) (Step S13) of operating the retarder 3 when the RPM and temperature conditions of the retarder 3 satisfy the RPM of the retarder 3 and the step of determining whether the retarder 3 in operation has reached the off- OFF period (period) when the retarder 3 in operation does not reach the OFF period (cycle), and the retarder 3 in operation is in the OFF state A step (S15) of stopping the retarder (3) when the period (cycle) of the retarder (3) (S18) of stopping the evaluation (S19) when the retarder 3 is defective and ending the evaluation (S19) and storing the analysis data in the data storage means if the retarder 3 is normal, A step (S20) of judging whether the number of evaluation (3) evaluations has reached the set number of times, a step (S20) ending when the retarder (3) has reached the set evaluation count, The process proceeds to the motor drive step S10 and the next evaluation of the retarder 3 proceeds.

A method of detecting the maximum braking torque when the retarder 3 is in operation (ON) and a method of measuring the three-phase voltage and current when a failure (unloading condition) occurs in the analysis and judgment step S16, It is possible to confirm the breakage portion or the breakage portion.

If the temperature condition of the retarder 3 exceeds the upper limit set temperature and the braking torque exceeds the average torque or the set torque in the case of the step S19 for stopping the evaluation of the retarder 3 in the above, The evaluation of the retarder (3) is discontinued, and the evaluation is discontinued even if the number of evaluations exceeds the set number of evaluations.

FIG. 7 illustrates a screen displayed on the monitor M. In the upper left corner of the screen, three-phase voltage waveforms detected by the three voltage sensors 8 are output. Three current sensors 7, And the rotation torque of the retarder 3 and the rotation speed graph are output to the lower left side of the screen, the evaluation count input / output graph is outputted at the lower right end of the screen, and the data (A), the effective voltage (Vrms) and the effective voltage (Vrms) for the phase A and the phase B for the phase B are displayed at the bottom of the storage button. (Irms) and a DC link voltage are respectively displayed. At the lower end of the DC link voltage, a rotation speed indicator and a braking torque indicator are respectively displayed. At the lower end of the rotation speed indicator, a coil temperature is indicated by a bar graph and numerals. Indie At the bottom of the gate, the drum temperature is indicated by a bar graph and numerals, and a stop button (STOP) is displayed at the bottom of the rotation speed indicator and braking torque indicator.

The present invention can synchronize data such as the rotational speed, the braking torque, the voltage, the current, and the temperature detected (measured) in the retarder 3 and can verify the durability and initial performance of the retarder 3 , It is possible to detect and correct the braking torque fluctuation phenomenon according to the phase unbalance, and it is possible to construct a torque map for the control.

The present invention can detect not only the braking force, the rotational speed of the drive shaft, the pressure of the coil, the temperature of the coil, and the temperature but also the voltage and the current, thereby preventing system breakage through temperature feedback of the retarder system, .

When evaluating the retarder 3 in the present invention, when the coil temperature of the retarder 3 exceeds 180 ° C or the drum temperature of the retarder 3 exceeds 550 ° C Or when the braking torque is 1500 Nm or more, or when the rotational speed is below the specified rotational speed (rpm). In this case, the three-phase voltage and the three-phase current may be measured to check the occurrence of the failure, .

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. This is possible. Therefore, the scope of the present invention should not be construed as being limited to the embodiments described, but should be determined by equivalents to the appended claims, as well as the appended claims.

(1) - retarder evaluation system (2) - expectation
(3) - retarder (4) - motor
(5) - drive shaft (6) - infrared temperature sensor
(7) - current sensor (8) - voltage sensor
(9) - coil temperature sensor (10) - rotational speed and braking torque detector
(11) - controller (12) - clutch
(13) - Support means (15) - LM guide
(17) - Bridge

Claims (10)

A retarder installed on the expectation;
A motor and a drive shaft installed on the base and rotating the rotor of the retarder;
An infrared ray temperature sensor for detecting the drum temperature of the retarder;
Three current sensors for detecting the three-phase current of the retarder;
Three voltage sensors for detecting the three-phase voltage of the retarder;
A coil temperature sensor for detecting a coil temperature of the retarder;
A rotational speed and braking torque detector and controller for detecting the rotational speed and braking torque of the retarder;
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The current sensor, the voltage sensor and the coil temperature sensor are connected to the input terminal of the bridge,
The input / output unit of the controller is connected to the input of the bridge,
Wherein the rotational speed and braking torque detector are connected to an input of a controller,
A DAQ is connected to an output terminal of the bridge,
And a monitor having a microcomputer, a PC, or a PLC is connected to a rear end of the DAQ. delete delete The method of claim 1,
Wherein the motor is one of an inverter motor, a stepping motor, and a servo motor. The method of claim 1,
A clutch and braking means provided on the drive shaft;
And an evaluation system for verifying the performance of the retarder. The method of claim 1,
Wherein the retarder is configured to be supported by the support means and configured to be slidable in the direction opposite to the drive axis by the LM guide and to fix the retarder during the evaluation time when the evaluation position of the retarder is determined;
And an evaluation system for verifying the performance of the retarder. The method of claim 1,
On the monitor screen,
The three-phase voltage waveform detected by the three voltage sensors is output in the upper left corner of the screen,
The three-phase current waveform detected by the three current sensors is output at the upper right of the screen,
The rotary torque and speed graph of the retarder are displayed at the bottom left of the screen,
The evaluation count input / output graph is displayed at the lower right of the screen,
The data storage path is displayed at the upper right of the screen,
At the bottom of the storage path, the motor speed and save button are displayed,
The voltage (V), the current (A), the effective voltage (Vrms), the effective current (Irms) and the DC link voltage for the A phase B phase C are displayed at the bottom of the storage button,
The rotational speed indicator and the braking torque indicator are displayed at the lower end of the DC link voltage,
At the bottom of the rotation speed indicator, the coil temperature is displayed in bar graphs and numbers,
At the bottom of the braking torque indicator, the drum temperature is displayed in bar graphs and numbers,
And a stop button (STOP) is displayed at the lower end of the rotation speed indicator and the braking torque indicator. A retarder installed on the base, a motor and a drive shaft mounted on the base and rotating the rotor of the retarder, an infrared temperature sensor for detecting the drum temperature of the retarder, Three voltage sensors for detecting the three-phase voltage of the retarder, a coil temperature sensor for detecting the coil temperature of the retarder, a rotational speed sensor for detecting the rotational speed of the retarder and a rotational speed And an input terminal of a bridge to which the current sensor, a voltage sensor and a coil temperature sensor are connected, an input terminal of a bridge to which the input / output unit of the controller is connected, and a controller to which the rotational speed and the braking torque detector are connected A DAQ connected to an output terminal of the bridge, and a monitor connected to a rear end of the DAQ and including a microcomputer or a PC or a PLC A method for evaluating durability and performance of an aligner, comprising:
a) an evaluation criterion setting step of setting a rotation speed of the motor for rotating the retarder to be evaluated, an ON / OFF period and a repetition number of the retarder;
b) driving a motor for rotating the retarder to be evaluated;
c) operating the retarder if the rotational speed of the motor satisfies the set rotational speed and temperature condition;
d) stopping when the retarder in operation reaches an OFF period;
e) analyzing and determining whether the retarder is normal;
f) stopping and terminating the evaluation if the retarder is bad and storing analysis data if the retarder is normal;
g) ending when the number of retarder evaluations reaches a set number of times, and moving to a motor drive stage and performing a re-evaluation of retarders if the number of retarder evaluations does not reach the set number of times;
And an evaluation method for performance verification. The method of claim 8,
In step e) of analyzing and determining whether the retarder is normal,
And the three-phase voltage and the three-phase current are measured in the event of a failure of the retarder, thereby confirming the breakage occurrence portion of the retarder. The method of claim 8,
If the retarder is bad, in the step f) to stop and terminate the evaluation,
When the temperature condition of the retarder exceeds the upper limit set temperature, when the braking torque exceeds the set torque, or when it exceeds the set evaluation number, the retarder evaluation is stopped Evaluation Method for Retarder Durability and Performance Verification.

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