After sufficient communication and negotiation, Party A and Party B have reached a consensus on entrusting Party B to design and manufacture ACD-15KW AC power dynamometer for AC permanent magnet synchronous motor performance testing system, and have formulated this technical agreement. The annex to the main contract of this agreement has the same legal effect as the main contract.

one、The technical requirements of Party A for the testing system

a) Test the performance of the motor and provide accurate and reliable test charts and data;

b) Evaluate the load performance, efficiency characteristics, and safety protection functions of the motor;

c) The system design is mainly based on the principles of easy installation, debugging, and maintenance;

d) Principle of selecting experimental equipment: It can fully meet the configuration requirements of the test bench proposed by Party A;

e) Principle of maturity and reliability: The design of the test bench first ensures maturity and reliability, selecting mature technologies and equipment;

f) System design principles: standardization, serialization, generalization, integration, progressiveness and safety;

g) Appearance requirements: The surface of the control cabinet is treated with spray coating, taking into account heat dissipation, cleanliness and aesthetics, and clear labeling.

twoEnvironmental conditions

a) The ambient temperature ranges from 0 to 50 ℃;

b) Environmental humidity ≤ 85%;

c) There shall be no excessive dust, acid, salt, corrosive or explosive gases in the air;

d) Stay away from electromagnetic interference and mechanical vibration sources on site.

3、 Design basis and standards for bidding equipment

1. The testing items and methods for motor products comply with the following standards, but are not limited to the following standards.

2. GB 755-2008/IEC 60034-1:2004 "Rating and Performance of Rotating Electrical Machines"

3. GB/T 1032-2012 "Test Methods for Three phase Asynchronous Motors"

4. GB/T 22669-2008 Test Methods for Three phase Permanent Magnet Synchronous Motors

5. GB/T 9651-2008 "Test Methods for Single phase Asynchronous Motors"

6. GB14711-2006 "Safety Requirements for Small and Medium sized Rotating Electrical Machines"

7. GB/T18613-2012 "Energy Efficiency Limits and Grades for Small and Medium Three phase Asynchronous Motors"

8. GB/T1311-2008 "Test Methods for DC Motors"

9. GB/T5171-2002 General Technical Conditions for Small Power Electric Motors

4、 Software testing project

5、 Composition of testing system

6、 Test system diagram

7、 Key components of the testing system

a) Load motor:

Rated torque 95.5Nm, rated speed 1500rpm, maximum speed 3000rpm, power 15kW.

b) Torque and speed sensor model: JN338-100A

Specification (N.m)

Φd(j6)

ΦD

A

L

L1

H

h

E

B

C

F

Maximum speed (r/min)

Accuracy

50

Φ18

Φ85

150

224

32

123

58

72

62

6.5

112

6000

Level 0.2

c) Three phase electrical parameter tester (test driver input terminal) model: GDW3001A

Electric parameter measuring instrument (also known as digital power meter), replacing traditional pointer instruments, can simultaneously measure parameters such as voltage, current, power, power factor, frequency, etc. of single and three-phase electrical equipment. Voltage: 0-500V, current: 0-40A, accuracy of 0.5 level, accurate measurement, direct display, rich measurement content, with wide range, latch and communication functions.

d) Torque and speed tester model: VG2218C

The dynamometer controller is used in conjunction with various types of dynamometers, torque and speed sensors, etc. The instrument adopts a new core with high-speed, assembly line, and advanced simplified instruction set structure, with a running speed of 10MIPS, and is equipped with an integrated high-speed digital filter A/D for sampling.

Measurement parameters:

Speed: 0-35000r/min, accuracy: ± 0.2%;

Torque: 20mN · m~5000N · m (total range of 20), manual switching, accuracy: ± 0.5%;

Power: 0.00W~9999KW, excitation current: (0-2) A (loading capacity);

e) ABB frequency converter model: ACS880-01

The rated working voltage of the frequency converter is 380V, and it is air-cooled.

The frequency converter has good input harmonic suppression function, and the entire speed regulation

Harmonics within the range do not affect other electrical equipment and do not affect control

The communication system is causing an impact.

The frequency converter complies with national standards such as GB, ISO, IEO, IEEE, etc

Design and manufacture according to international and industry standards.

The frequency converter adopts IGPT power components, and the power components are selected from ABB company

Product.

The frequency converter has good speed regulation performance and low-speed operation performance

Adjustment accuracy of 0.1HZ, stability of 0.5%, with good loading performance

characteristic.

Has anti drag performance.

It has protection functions such as overcurrent, overvoltage, undervoltage, phase loss, short circuit, overclocking, stall, overheating of power components, and instantaneous power outage.

The AC power dynamometer will feedback the loaded energy and achieve the cyclic utilization of the loaded energy.

The AC variable frequency power dynamometer uses an AC variable frequency motor as the load motor, and adjusts the load and provides energy feedback through a four quadrant vector engineering variable frequency device. It is paired with a torque sensor to form a high-performance AC electric dynamometer.

There are two types of AC variable frequency power dynamometer: AC variable frequency grid feedback loading and DC bus feedback loading. The AC variable frequency power dynamometer consists of a variable frequency motor and an AC feedback grid four quadrant DTC frequency converter; The DC bus power dynamometer consists of two AC variable frequency motors and two common bus feedback DTC frequency converters.

Compared with other load (dynamometer) devices, AC power dynamometers have the following unparalleled advantages:

(1) As a dynamometer, it is necessary to complete both loading and driving functions.

(2) It can operate in four quadrants, which means it can be used as both a generator and an electric motor; It can be loaded forward or backward. This is very ideal for tests such as engine tests that require reverse towing and transmission tests that require forward and reverse loading.

(3) Energy saving: Due to the use of power generation feedback loading, the energy-saving effect of the DC bus power dynamometer system is particularly significant. Especially for fatigue life testing, the energy-saving effect is very significant. The energy-saving efficiency mainly depends on the efficiency of the test bench transmission, usually around 80%

(4) The loading characteristics are very good: constant torque loading can be maintained below the rated speed (0 speed or even reverse), and constant power loading can be achieved above the rated speed.

(5) Since the loader itself does not consume loading power (feedback to the grid or input), it does not require a device that requires a large amount of water as a medium like hydraulic dynamometers and cooling with water like eddy current dynamometers.

(6) The stability of constant torque and constant speed control is unparalleled by other loaders, as it can maintain extremely high stability (0.1% -0.3%) throughout the entire speed (even at zero speed) and torque range.

(7) There are two working modes available: constant torque (loading) and constant speed (reverse drag) to meet different testing needs.

(8) Simple structure, good stability and reliability, easy to use.

(9) It can easily achieve zero torque and zero speed starting, to achieve true impact free soft starting for the power grid and machinery.