ELECTRIC MACHINES

TEST BENCH FOR ELECTRIC MACHINES

DL EM-TEST The DL EM-TEST is a multipurpose bench for the study and characterization of the Eurolab series (0.3 kW) and Unilab series (1.1 kW) electric machines using an automated test approach. The system is composed of the following main sections:

Prime mover: A squirrel cage three-phase asynchronous machine controlled by an inverter

in four quadrant operation providing the mechanical power and torque necessary for the

characterization of the machine under study.

Data acquisition software for electric machines: performs the test automation and provides

the user interface to execute the experiments. The SW developed in LabVIEW

communicates with the acquisition devices via serial port using the Modbus protocol,

reading electrical and mechanical data from instruments.

HMI gateway: provides the commands to the prime mover, so it can be used as drive, load

or a speed and torque control to put the machine under test in a specific working condition

or to simulate different load profiles such as fan, lift, etc.

Instruments: collect mechanical (speed, torque and temperature) as well as electrical data

(AC and DC, Voltage, current and Power).

ELECTRIC MACHINES

The didactic acquisition and automation software guides the student through the different

experiments available for the study of various types of single and three-phase AC, DC and brushless

machines, motors and generators, through an intuitive user interface.

The automated test approach enables the student to monitor and control several variables of the electric machine under test in real-time, to easily observe their behaviour and interaction under several operating conditions such as load, no load, variable speed and torque, or different excitation values. The characteristic curves that can be obtained with the system provide accurate information to create a model of the machine, tune its controller and study the machine applications. According to the machine under test, the studies that can be performed include:

Motor and generator operation

Torque vs. speed characteristic

Torque vs. current characteristic

Voltage vs. speed characteristic

Efficiency

Generator synchronization with network

Power factor.

ELECTRIC MACHINES

Test bench composition:

DL 1021 Squirrel cage three-phase asynchronous motor 1

DL 2108T28 Inverter for three-phase induction motors 1

DL 2108T26BR Brake resistance 1

DL 10065NF Electric power measuring module 1

DL 50050TR1 Mechanical power measuring module 1

DL 50050TR-EM Digital torque meter and speed encoder 1

DL 4251 Digital HMI Gateway 1

DL 2109D30 Digital Power meter 1

DL HUBRS485F Communication MODBUS 1

DL PCGRID PC 1

DL 8330SW Electric machines acquisition software 1

DL A120-3M Three-level aluminum frame 1

DL T12090 120x90 Workbench 1

DL T06090 60x90 Workbench 2

DL 2600TTI Isolation transformer 1

DL 1013A-AS Universal base 1

TLEM-TEST Cable kit for DL-EM Test 1

Optional:

DL 4250 Scope acquisition 1

The electrical machines to be studied with the DL EM-TEST bench can be selected from the following list with its corresponding accessories and power supply.

ELECTRIC MACHINES

POWER SUPPLY

0.3 kW (Eurolab)

DL 30017 (motor driven) Output voltages Variable AC: 3x0÷380 V, 2A (programmable) 3x0÷240 V, 3 A (programmable) Fixed AC: 3x380 V + N, 10 A Standard fixed AC: 220 V, 10 A Variable DC: 0÷240 V, 4 A (programmable) 0÷225 V, 1 A Power supply: 3x380 V+N+PE, 50/60 Hz

1.1 kW (Unilab)

DL 1013M1 Output voltages Variable AC: 3x0÷440 V, 5 A (programmable) 3x0÷240 V, 10 A (programmable) Fixed AC: 3x380 V + N, 16 A Standard fixed AC: 220 V, 10 A Variable DC: 0÷290 V, 12 A (programmable) 0÷225 V, 1 A Fixed DC: 220 V, 1 A Maximum total output power: 3 kVA Power supply 3x380 V+N+PE, 50/60 Hz

ELECTRIC MACHINES

SINGLE PHASE MOTORS 0.3 kW 1.1 kW

SPLIT-PHASE MOTOR Single-phase squirrel cage asynchronous motor; possible operation with either permanent or only for starting external capacitor.

DL 30130 Technical features: • Power: 220 W (370 W) • Voltage: 220 V • Current: 3.6 A (3 A) • Speed*: 2720 rpm, 50 Hz

DL 1028 Technical features: • Power: 1.1 kW (0.6 kW) • Voltage: 220 V • Current: 9.5 A (7.0 A) • Speed*: 2880 rpm (2850 rpm), 50Hz

CAPACITOR UNIT Set of capacitors for either starting or steady-state running of the split-phase motor.

DL 30135

DL 1028AC

CAPACITOR MOTOR Single-phase squirrel cage asynchronous motor with split phases and running capacitor.

DL 30140 Technical features: • Power: 370 W • Voltage: 220 V • Current: 3 A • Speed*: 2720 rpm, 50 Hz

DL 1028C Technical features: • Power: 1.1 kW (0.64 kW) • Voltage: 220 V • Current: 6.5 A (6.2 A) • Speed*: 2750rpm (2850rpm), 50 Hz • Capacitor: 36 µF • Cosφ: 0.98 (0.70)

ELECTRIC MACHINES

UNIVERSAL MOTOR Single-phase collector motor with inductor winding in series to the winding of the rotor; able to operate either with ac or dc power supply.

DL 30150 Technical features: • Power: 260 Wac / 260 Wdc • Voltage: 220 Vac / 220 Vdc • Current: 3.5 Aac / 3 Adc • Speed*: 3000 rpm, 50 Hz

DL 1029 Technical features: • Power: 0.3 kWac /0.55 k Wdc • Voltage: 170 Vac/ 190 Vdc • Current: 6 Aac/ 4.5 Adc • Speed*: 3300 rpm, 50 Hz

REPULSION MOTOR Single-phase collector motor with short-circuited rotor.

DL 30170 Technical features: • Power: 250 W • Voltage: 220 V • Current: 3.8 A • Speed*: 3000 rpm, 50 Hz

DL 1029R Technical features: • Power: 0.3 kW • Voltage: 220 V • Current: 3.6 A • Speed*: 3000 rpm, 50 Hz

(*) NOTE: All speed values are shown with an operating frequency of 50Hz. For 60Hz operation, speed values will differ (around 20%).

ELECTRIC MACHINES

THREE PHASE ASYNCHRONOUS MOTORS 0.3 kW 1.1 kW

SQUIRREL CAGE THREE-PHASE ASYNCHRONOUS MOTOR Induction motor with three-phase stator winding and squirrel cage buried in the rotor.

DL 30115 Technical features: • Power: 370 W • Voltage: 220/380 V Δ/Y • Current: 2/1.1 A Δ/Y • Speed*: 2650 rpm, 50 Hz

DL 1021 Technical features: • Power: 1.1 kW • Voltage: 220 /380 V Δ/Y • Current: 4.3 / 2.5 A Δ/Y • Speed*: 2870 rpm, 50 Hz

STAR/DELTA STARTER Star/delta starter for the three-phase squirrel-cage induction motors

DL 2035

SLIP RING THREE-PHASE ASYNCHRONOUS MOTOR Induction motor with both stator and rotor three-phase windings.

DL 30120 Technical features: • Power: 370 W • Voltage: 220/380 V Δ/Y • Current: 2.7/1.6 A Δ/Y • Speed*: 2800 rpm, 50 Hz

DL 1022 Technical features: • Power: 1.1 kW • Voltage: 220/380 V Δ/Y • Current: 4.7 / 2.7 Δ/Y • Speed*: 3450 rpm, 50 Hz

STARTING AND SYNCHRONIZATION UNIT Starting rheostat for the three-phase slip ring induction motors and excitation device for the synchronization of the motor with the mains

DL 30125

DL 1022RHD3

ELECTRIC MACHINES

POLE CHANGING UNIT Switch to change the number of poles in Dahlander type motors

DL 2036

THREE-PHASE 2-SPEED SQUIRREL CAGE ASYNCHRONOUS MOTOR (2/4 POLES) 2 or 4 pole induction motor with Dahlander-type three-phase stator winding and squirrel cage rotor.

DL 30180 Technical features: • Power: 300/450 W • Voltage: 380 V • Current: 1.1/1.35 A • Speed*: 1350/2650 rpm, 50 Hz

DL 1027 Technical features: • Power: 0.9/1.1 kW • Voltage: 380 V • Current: 2.5/3.3 A • Speed*: 1420/2830 rpm, 50 Hz

THREE-PHASE 2-SPEED SQUIRREL CAGE ASYNCHRONOUS MOTOR (2/8 POLES) 2 or 8 pole induction motor with three-phase split stator windings and squirrel cage rotor.

DL 30270D Technical features: • Power: 150/370 W • Voltage: 380 V • Current: 0.75/1.15 A • Speed*: 680/2800 rpm, 50 Hz

POLE SWITCHING UNIT Switch to change the number of poles in motors with two separate windings

DL 30275

(*) NOTE: All speed values are shown with an operating frequency of 50Hz. For 60Hz operation, speed values will differ (around 20%).

ELECTRIC MACHINES

DIRECT CURRENT MACHINES 0.3 kW 1.1 kW

POLIEXCITED MACHINE Suitable for series, shunt or compound excitation motor or generator.

DL 30220P

DL 1024R

STARTING RHEOSTAT Step-variable rheostat for the half torque starting of the dc motors of the laboratory

DL 30200RHD

DL 1017RHD

EXCITATION RHEOSTAT Suitable for the shunt excitation of the dc machines and of the synchronous machines of the laboratory

DL 30205

DL 1017RHE

EXCITATION RHEOSTAT Suitable for the series excitation of the dc machines of the laboratory

DL 30206

DL 1017RHES

ELECTRIC MACHINES

DIRECT CURRENT MOTOR COMPOUND EXCITATION It can be also used as a generator.

DL 30220 Technical features: • Power: 300 W • Voltage: 220 V • Speed: 3000 rpm • Excitation: 140 V / 0.12 A

DL 1023 Technical features: • Power: 1.1 kW • Voltage: 220 V • Speed: 3600 rpm • Excitation: 180 V / 0.27 A

DIRECT CURRENT MOTOR SHUNT EXCITATION It can be also used as a generator.

DL 30200 Technical features: • Power: 300 W • Voltage: 220 V • Speed: 3000 rpm • Excitation: 160 V / 0.25 A

DL 1023P Technical features: • Power: 1.1 kW • Voltage: 220 V • Speed: 3000 rpm • Excitation: 190 V / 0.28 A

DIRECT CURRENT MOTOR SERIES EXCITATION It can be also used as a generator.

DL 30210 Technical features: • Power: 300 W • Voltage: 220 V • Speed: 2800 rpm

DL 1023S Technical features: • Power: 1.1 kW • Voltage: 220 V • Speed: 2800 rpm

MOTOR-DRIVEN RESISTIVE LOAD Suitable for realizing resistive single or three-phase resistive loads through manual or automatic operation.

DL 30045 Technical features: • Resistance: 3 x (3300÷480) Ω • Current: 3 x 0.46 A • Power supply: 220 V, 50/60 Hz

DL 2096 Technical features: • Resistance: 3 x (1320÷120) Ω • Current: 3 x 1.8 A • Power supply: single-phase from mains

ELECTRIC MACHINES

SYNCHRONOUS MACHINES 0.3 kW 1.1 kW

THREE-PHASE SYNCHRONOUS MACHINE Machine with smooth inductor and three-phase stator armature winding for operation either as an alternator or as a synchronous motor.

DL 30190 Technical features: • As alternator: Power: 300 VA • As motor: Power: 300 W • Voltage: 220/380 V Δ/Y • Current: 0.8/0.46 A Δ/Y • Speed*: 3000 rpm • Excitation: 190 V / 0.26 A

DL 1026A Technical features: • As alternator: Power 1.1 KVA • As motor: Power 1 kW • Voltage: 220/380 V Δ /Y • Current: 2.9/1.7 A Δ /Y • Speed*: 3000 rpm • Excitation: 180 V / 0.47 A

PARALLEL BOARD Rotating light synchronoscope, complete with the accessories that are required to perform the parallel connection between synchronous generators or between the alternator and the mains.

DL 1030

RELUCTANCE MOTOR Three-phase synchronous motor with squirrel cage rotor without dc excitation.

DL 30270 Technical features: • Power: 100 W • Voltage: 220/380 V Δ/Y • Current: 1.1/0.6 A Δ/Y • Speed*: 3000 rpm , 50 Hz

DL 1026R Technical features: • Power: 0.5 kW • Voltage: 220/380 V Δ /Y • Current: 3.6/2.1 A Δ /Y • Speed*: 1500 rpm, 50 Hz

ELECTRIC MACHINES

MOTOR-DRIVEN RESISTIVE LOAD Suitable for realizing resistive single or three-phase resistive loads through manual or automatic operation.

DL 30045 Technical features: • Resistance: 3 x (3300÷480) Ω • Current: 3 x 0.46 A • Power supply: 220 V, 50/60 Hz

DL 2096 Technical features: • Resistance: 3 x (1320÷120) Ω • Current: 3 x 1.8 A • Power supply: single-phase from mains

INDUCTIVE LOAD

DL 30040L • Single or three-phase inductive step-

variable load. • Max. power: 3 x 100 VAR • Max. voltage: 220/380 V Δ/Y

DL 1017L • Single or three-phase inductive step-variable load. • Max. power: 3 x 300 VAR • Max voltage: 220/380 V Δ/Y

CAPACITIVE LOAD

DL 30040C • Single or three-phase capacitive step-

variable load. • Max. power: 3 x 105 VAR • Max. voltage: 220/380 V Δ/Y

DL 1017C • Single or three-phase capacitive step-variable load • Max. power: 3 x 275 VAR • Max voltage: 220/380 V Δ/Y

RESISTIVE LOAD

DL 30040R • Single or three-phase resistive step-variable load. • Max power: 3 x 110 W • Max. voltage: 220/380 V Δ/Y

DL 1017R • Single or three-phase resistive step-variable load. • Max power: 3 x 400 W • Max voltage: 220/380 V Δ/Y

(*) NOTE: All speed values are shown with an operating frequency of 50Hz. For 60Hz operation, speed values will differ (around 20%).

ELECTRIC MACHINES

BRUSHLESS MOTOR

DL 2108T26 BRUSHLESS MOTOR WITH CONTROLLER Study of automatic control for a brushless motor. • Control and operation of a brushless motor in voltage The system allows the study of the operation of a brushless motor of a typical industrial process automation. The student has the opportunity to learn to control and parameterize an automatic operation. The control and monitoring system can be done through a software that can: • Set system parameters • Draw graphic curves • Monitor real-time system (torque, speed, ...) Specifications • 1kW power brushless motor with electronic encoder • Control of the system in frequency and voltage • Mechanical braking system for the analysis of the torque • Encoder outputs for the analysis of speed • Display system for controlling and monitoring events • Button start and stop action and automatic stop intervention in case of

alarm • Complete software for PC interfaced to the system via RS485