Download code Description Technical specifications DL 2309B SPEED

code
DL 2309B
Description
SPEED CONTROL OF AC
MOTORS
Technical specifications
Didactic equipment: electronic frequency converter for the open and closed loop speed regulation of a threephase induction motor. Potentiometers for speed setting and acceleration and deceleration ramps.
Reversal in the direction of rotation.
Technical features: Power: 4 kW - Nominal current: 9 A -Output frequency: 0 to 240 Hz -Dynamic braking
Complete with analogue meter for rotating speed and with electronic protections against overvoltage,
maximum current and over temperature.
The ac motor speed control system must consist in a full digital controlled inverter and it must offer the
following
capabilities:
a) speed regulation by keyboard or external potentiometer;
b) acceleration and deceleration times by keyboard or external potentiometers;
c) torque increase at low frequency (boost) to compensate for the resistive losses in the motor;
d) dc braking.
Moreover the following protections must be provided:
a) mains overvoltage;
b) motor overcurrent;
c) solid state short circuit output protection.
All the parameters must be easy programmable by a keyboard
The module must include the following Sections:
Power supply section: module supplied at single-phase supply through the power cord to beconnected to the
rear socket and the magnetothermic differential switch on the rear.
Driving section: including Key switch; Push button "start"; Push button "stop"; Switch "JOG"; Switch "cw/ccw";
Switch "LOOP".
Control section:
Potentiometer "SPEED": allowing to set the desired speed through an analog signal 0 to 10V.
Potentiometer "ta": allowing to set the acceleration time from 5 to 15 s approx.
Potentiometer "td": allowing to set the deceleration time from 5 to 15 s approx.
Display and keyboard: allowing the inverter programming.
Instrumentation and test points section:
Tachometer "min-1": ranges 0 to 4000/8000 min-1, operating only with tachometric transducer connected to
relevant connector.
Motor voltage: voltage waveforms, galvanically insulated and proportional to line-toline inverter output voltage,
available between test points Ui2 /U23/U31 and ground.
Motor current: line current waveform available between relevant test point and ground.
Trigger signals: drive waveforms applied to three-phase inverter available between test points and ground:
• R1 /R2: leg R
• Y1 /Y2: leg Y
• B1 /B2: leg B
Power section:
Input supply: mains 3x380/460 V ± 10%, 45-65 Hz.
Max motor power: 3.7 kW/5 hp.
Rated output current: 9.5 A.
Max output current: 14.3 A for 60 s.
Output voltage: 0 to 3x380/460 V (scale factor 0.00 to 115.47%).
Output frequency: 0 to 480 Hz.
Dc braking.
It must be possible to perform the following experiment : Reset and factory default settings - Operation of the
inverter in setpoint mode -Speed regulation in remote mode - Multispeed operation - Speed regulation in local
mode- Ixt overload -Motor power curve - Motor torque-speed curve - Variable frequency speed control - Closed
loop speed regulation
The unit must be supplied with a theoretical and practical manual in English language.