Instrument name: Hysteresis dynamometer and its testing system

Instrument model: ZC series

Features:

1、 Introduction: Hysteresis dynamometer and its testing system consist of hysteresis dynamometer, dynamometer controller, electrical parameter measuring instrument and other signal acquisition units, test power supply, operation console and electrical cabinet, dynamometer stand/fixture and accessories, computer and dedicated testing software. It can directly measure the input voltage, current, power and output torque, speed, output power and efficiency of the motor under no-load, load and locked rotor states by arbitrarily changing the load of the tested motor

2、 Main features of the system

1. Sampling time: Set the sampling time arbitrarily (20ms~1000ms) to meet the high-speed measurement needs of users.

2. Range and number of teeth setting: Users set the range based on the torque range and speed of the dynamometer itself, as well as the number of teeth on the gear plate or photoelectric encoder.

3. Hub function (station number selection): When configuring multiple (≥ 2) dynamometers, users can choose the VG2218C-JXQ type 8-way hub, which can be operated by computer software or VG2218C to select the specified dynamometer (or station). The hub automatically switches the corresponding signal, avoiding operational errors and safety caused by frequent plugging and unplugging of signal ports during dynamometer station replacement.

4. Automatic calibration and calibration function: In addition to retaining the manual calibration (including positive and negative full-scale, zero adjustment) function, users can automatically calibrate the entire process of the dynamometer on the computer. The calibration process is clear, and the calibration data can be stored on the computer. The calibration data table can be automatically generated and printed out.

5. Durability function: According to the requirements of the tested motor, the number of cycles, duration of each time period, load size (including no-load, light load, rated load, overload, locked rotor, stop, etc.), and durability conditions such as forward/reverse rotation can be set arbitrarily, and the set durability curve and the actual operating durability curve can be automatically displayed.

6. Load loading modes of dynamometer: excitation mode, constant torque mode, constant speed mode, constant current mode; The PID function ensures fast dynamic response and more stable operation of the load.

7. Synchronous sampling of motor operation input and output parameters: input voltage, current, power, power factor, frequency and output torque, speed, input power, efficiency. Having synchronous sampling during measurement ensures data consistency.

8. T-n characteristic testing function: For asynchronous motors, T-n characteristic testing is of great significance. From the T-n curve, the maximum and minimum torque of the motor can be tested.

9. Production line testing function: With the continuous improvement of customer quality control of motors, in addition to measuring and controlling the input parameters of motors, measurement and control of motor output parameters (torque, speed, output power, efficiency) are added at the factory. Under forward and reverse rotation conditions, the input voltage, current, power, output torque, speed, output power, and efficiency of motors can be automatically and continuously measured in sequence for no-load, load (or multi-point), and locked rotor states. Our company has been developing for many years, using unique image and curve simulation functions, adopting the optimal interval setting average algorithm, and automatically determining OK/NG based on the upper and lower limits set by the computer. This feature not only has good data repeatability, but also provides a more intuitive way to detect abnormal test data during motor installation or testing.

10. Dynamometer loading method: In addition to the traditional manual excitation loading method, this system has multiple automatic loading methods: constant excitation incremental loading method, constant torque incremental loading method, constant speed incremental loading method, constant torque loading method, constant speed loading method, and constant slope loading method.

11. Curve drawing and fitting function: The system can meet the testing requirements of users for various motors and test projects, and draw various parameter characteristic original curves, fit curves, and automatically generate no-load point parameters (current, speed), maximum torque point parameters (voltage, current, speed, efficiency, output power), maximum efficiency point parameters (speed, torque, current, output power), and maximum output power point parameters (speed, torque, current, output power).

12. Report and query function: Multiple curves can be drawn in the same coordinate to meet customers' analysis of product consistency and repeatability.

13. The powerful system function self-test and rapid on-site fault diagnosis capability are important indicators that the new generation of high-performance dynamometer systems must possess. Our company has carefully launched a portable dynamometer signal detection tool, which can quickly determine the source (point) of the fault by detecting the input and output signal size of each module unit (such as sensors, acquisition boards, dynamometer controllers, etc.) of the dynamometer system on site, greatly improving the system's service capability and efficiency.

14. Unique anti-interference and reliability design: The application of multi-level electromagnetic compatibility (EMC) technology (such as grounding, shielding, isolation, filtering, etc.) and the guarantee of good manufacturing processes. Ensure the reliability and anti-interference ability of the system, and the system can operate stably and reliably in environments with interference, sparks, high frequency, high voltage, and strong electrical shocks. Especially in the current environment, there is radiation from high-frequency power electronic devices, which is particularly necessary.

15. The new generation of high-quality dynamometer systems focuses on current motor energy efficiency certification and high-precision testing, and therefore is committed to the overall accuracy consistency of the system. Research on measurement repeatability is an important aspect of dynamometer systems. According to the characteristics of the usage scenario of the dynamometer system (the workplace is not equipped with air conditioning, and the ambient temperature cannot be guaranteed), it is necessary to improve the working temperature range of all module units and instruments in the dynamometer system under measurement accuracy (considering 0 ℃~50 ℃), and solve the problem that is easily overlooked by users in terms of ambient temperature (i.e. poor efficiency measurement repeatability in summer and winter).

16. Out of step point testing and maximum torque point capture function: Many motors require automatic testing of out of step point parameters or maximum torque point testing at different speeds, and automatic generation of characteristic curves of out of step torque or maximum torque versus speed (frequency).

3、 ZC series hysteresis dynamometer

Suitable for testing motors with high torque and speed in medium and small paths, such as asynchronous motors, low-power DC motors, series excited motors, and the electric tool industry.

Torque range: 0.002-30N. m, speed 0-30000r/min

Accuracy: Torque ≤± 0.5%, speed ≤± 0.2%

Hysteresis dynamometer model	test scope		continuous operation Power (W)	Overall dimensions	center height	weight	Continuous operation rate of air-cooled or water-cooled (W)
	Torque (N.m)	Rotational speed (rpm)		Length width height (mm)	(mm)	kg
ZC200KB	0.8－20	0-4000	1500	910-380-400	200	200	3000
ZC150KB	0.6－15	0-6000	1000	700-300-350	200	130	2000
ZC100KB	0.4－10	0-6000	1000	700-300-350	200	120	2000
ZC75KB	0.3－7.5	0-8000	600	700-300-280	150	90	1500
ZC50KB	0.2－5	0-8000	600	700-300-280	150	80	1200
ZC20KB	0.06－2	0-15000	300	550-270-220	130	60	600
ZC10KB	0.04－1	0-15000	200	550-270-150	130	40	400
ZC5KB	0.02－0.5	0-20000	100	450-220-150	110	30	200
ZC2KB	0.01－0.2	0-20000	40	330-180-150	110	25	80
ZC1KB	0.005－0.1	0-25000	20	330-180-150	100	20	40
ZC02KB	0.002-0.02	0-30000	10	330-180-150	100	18	20

4、 Dynamometer controller

VG2218C Technical Specifications

Measurement parameters: speed: 0-35000r/min, accuracy: ± 0.2%

Torque: 20N. m-5000N. m (20 ranges in total, manually switched) Accuracy: ± 0.5%

功率： 0.00W-9999KW

Excitation current: (0-2) A (loading capacity)

Test method: 1. Manual excitation adjustment 2. Constant torque (P.I.D) 3. Constant speed (P.I.D) 4. Automatic slope loading 5. Durability test 6. Out of step point test (optional)

The VG2218C dynamometer controller is used in conjunction with various types of dynamometers, torque and speed sensors, tension and compression 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.

VG2218A dynamometer controller

Used in conjunction with ZC series hysteresis dynamometer, ZF series magnetic powder dynamometer, and DW type eddy current dynamometer to display torque, speed, output power, and efficiency, and manually/automatically adjust load excitation current

Equipped with RS232 interface, it can form an automatic testing system with a computer

VG2218B dynamometer controller

By utilizing speed feedback (PID regulation), the excitation current of the dynamometer is controlled to achieve stable operation of the asynchronous motor in the unstable region, solving the problem of testing the characteristics of asynchronous motors in the unstable region.

Selection of components for hysteresis dynamometer and its testing system (standard configuration)