Comparison of various pump types: centrifugal pump, piston pump, side-channel pump
Experiments relating to key issues in pump engineering
Three-phase AC motors for centrifugal pumps and additional motor with Variable speed by frequency converter
Free position for additional pump
Operation of centrifugal pumps in parallel or series configuration.
The teaching unit is suitable for use both inthe laboratory and in a conventional combustion engine vehicle. Such a vehiclewill be supplemented by the main components of a hybrid vehicle, which can thenbe examined in detail
Pilot line with switching relays withintegrated LEDs to illustrate the switching function and system verification
Measurable voltage at the inverterapproximately 210V
Connecting the terminals 30, 31 and 15
Disconnect with original service plug
Signals at the symbolic electric motormeasurable, also filtered in sinusoidal shape, by the smoothing effect of theengine
Signals at the inverter input and outputmeasure, approximately 210V including charging and discharging curves
Inverter generates 3-phase PWM signals, about210V
Signals and messages of the CAN-Buscommunication measurable.
Learning Objectives:
Acquire knowledge about the interaction ofthe electronic components between the high-voltage battery, inverter andelectric motor
Criteria for the use of test devices
Deepen your expertise to optimally adjust oscilloscopes and evaluate the presentations
Represent pulse width modulated signals and sinusoidal wave forms in detail with the oscilloscope, also between individual phases
Recognize the dangers of high-voltage power components, explain accident prevention regulations
Security rules: disconnect, secure against reconnection, ensure that there is no voltage, log the steps.
Custom Power Supply Series
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It is used to understand indirect relation between verified armature turning and current direction, and direction of magnetic field line, and used to master principle of rotation of motor working. It is used for student to familiar with main structure of motor, and it can run on AC or DC.
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It consists of plane mirror, plane mirror stents, triangular rule, plastic candle. The object and image flips left to right, but are the same size. The image of object affected in plane mirror is virtual image. It is used to prove that the line between plane mirror and image, and the line between object and image are normal to mirror surface, and are equal to distance of mirror surface.
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Fully functional generator with multifunction controller, specially prepared fortraining purposes
Ignition start-switch, measuring and display devices, battery connection boards and consumers well-structured in the frame
All components connected outwards with 4 mm sockets, recordable and verifiable bymeasurement
Fault simulation, drive engine speed controlled
Teacher-student working documents and detailed accompanying documentation.
Feasible experiments
Simulateerrors such as open or short circuit of individual diodes
Troubleshooting with the oscilloscope possible
Batterycharging with the generator
Diodes,capacitor and regulator plugged from the outside, open or short circuit ofindividual diodes possible
Loadon the generator - alternator test.
Dimension (L*W*H CM): φ3.5*0.6
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The starter is equipped with thermal protection facilities, a start-stop push-button station and two pilot lamps indicating respectively the supply and the run state of the motor driven. This permits the utilization of banana-type jumper leads between the power supply and other components in the circuit. Specifications and/or diagrams are silk-screened on the back of a clear-plastic front panel for ease of identification. It is housed in a half-size totally enclosed portable modular unit. The Autotransformer Reduced Voltage Starter 60 HZ is an autotransformer reduced voltage starter for 1/3 hp (250 W) that is used to start squirrel cage motors that require limited current and reduced voltage at acceleration. The trainer is protected by a either a diode or thermal-magnetic circuit breaker. Connections to the unit are made through 4 mm standard color-coded, five-way binding posts. Requires a 120/208V 60Hz circuit.
Educational Advantages:
Used to start squirrel cage motors that require limited current and reduced voltage at acceleration
Indicates respectively the supply, the run state of the motor driven and adjustable time delay
Three phase unit
It is composed of laser generator, fixed mount, extender lens, magnet and tripod. It consists of semiconductor light-emitting devices, electronic circuit and lens, it emits 630nm-680nm red laser and is good light source to study geometrical optics in physics.
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Experiments on turbines: closed water circuit for supplying turbines
Pipes and fittings made of PVC
Digital displays for pressures, flow rate, speed and torque
3-phase AC motor for pump with variable speed via frequency converter
Determining characteristic variables of a centrifugal pump
Non-contact speed measurement at the turbine shaft and force sensor at the brake for measuring the torque
Experiments on a pump in a closed water circuit with storage tank and flow control valve to adjust the back pressure.
The Cutaway Trainer demonstrate the operation of a Vertical Four Stroke Small Engine.
Educational Advantages:
Driven by hand crank
Cutaway small engine of your choice.
Investigation and operating behaviour of pumps in various operating modes
Adjustment of flow resistance by a valve at outlet of the pump
Sensors for pressure at inlet and outlet of the pumps and flow rate
Single pump, series or parallel pump operation, configurable via valves
One pump with variable speed and one pump with fixed speed
Microprocessor-based measuring technique
Closed water circuit contains centrifugal pumps with drive motor and a transparent water tank.
A control unit digitises the course over time, height and frequency of the sensor voltages to further process these actual values in the micro controller. This subject summary takes into consideration the fact that all electronic vehicles systems record the actual value of apartial system under consideration with sensors. Sensors convert non-electricalphysical values like positions of actuators, temperatures, pressure,brightness, etc. to electrical voltage that is decrypted by a control device.
This is where the service workshop comes in, where the sensor-side is diagnosed bymeasuring technology. The present lab system provides real measured values forthe intact and defective system by the diversity of practice-related sensors. In state-of-the-art vehicle systems,onboard-diagnosis is a standard. The reason for this is the fact that acontrol unit cannot actually recognise whether the sensor, its connection lines to the control unit or digitalisation in the control unit are defective. Workshop practice shows, however, that anyinput interferences recognised by the control unit are only formulated in veryvague detail in the error storage.
Diagnosis of electrical systems is essential atthe car service workshop. The basis of diagnosis is the competence ofrecognising the electrical basic principles applied in the diverse, networkedvehicle systems, how they interact in a partial system and how to verify thisin measurements. The system comprises all required components; it is compact, can be used at once,and permits free wiring. The focus of the pedagogically valuable coursedocuments is on car diagnosis.
In the end these initially seemingly chaotic partial and overall systems can bereduced to simple circuits where the basic principles apply. When using vehicle lamps in the basiccircuits and collecting experience with non-linear behaviour, the learners maketheir first step into the professional world. The unique course comprises comprehensive documentation and extensive worksheets for teachers and students.The solutions book contains additional further explanations and solution charts. It can be assumedthat the trainees targeted here are not dealing with electrical engineering forthe first time. Still, the first tasks may commence with basic circuits already known to confirm what was taught before.
It consists of cylinder, base, end cap, piston and seal ring. The cylinder is made of organic glass, with length of cylinder 130mm, outer diameter φ25mm and inner diameter φ10mm. diameter of base is φ65mm, diameter of handle is φ40mm and diameter of piston is φ8mm. It is used to demonstrate experiment of “temperature increases with air is compressed”.
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Formation and effect of water hammer
Waste valve with adjustable lift, closes cyclically due to flow force of the water
Tank with check valve and air volume is used as an air vessel
Pumping using water hammer
Elevated tank with variable pump head
Air volume in the air vessel is varied by vent valve
Fixed overflow tank is used as a water source, e.g. river, pool.
Features:
Six individual errors can be selected byrotary switches in each circuit
For troubleshooting and voltage dropmeasurements 47 test sockets are available
Automotive relation with three typical,simple circuits for automotive lamps: conventional, with relay, with transistor
Colored printed circuits instandard-compliant display
Learning Objectives:
Use part voltage measurements in intact anddefective circuits as a diagnostic method
Measuring in the correct place in the harness
Creating and evaluating protocols forreference values and actual values
Get to know typical lamp circuits
Using the multimeter to measure voltage
Interpret measured voltages correctly andthus identify the main cause of an error.
Measurement of drag via two-component force sensor
Removable spacer plate allows two wake rake positions for measurement
Investigation of the wake of a cylinder immersed in a flow
Accessory for the wind tunnel
Display of the pressures on the 16 tube manometers
Cylinder as drag body
Wake rake with 15 Pitot tubes detects total pressures.
Designed engine and color printed, clear presentation of thetransistor circuit
Automatic mode: precise control of the drive to a standstill
Voltage measurement points in the three phases including additional current-measuringpoints with an integrated shunt, measuring socket in star point
LED'sin each of the three phases indicate the direction of current to and from the engine - and thus the magnetization of the coil
LED'sin each transistor indicate the status
Manual mode: Individual on and off switching of the transistors in the inverter
Low voltage for safe handling.
Learning Objectives:
Pressing the switches in the correct order will move the motor gradually to work out thebasic function
Acquire knowledge about the interaction of the electronic components in the inverterand electric motor
Represent pulse width modulated signals and sinusoidal wave forms in detail with theoscilloscope, also between individual phases
Deepen your expertise to optimally adjust oscilloscopes and evaluate the presentations.
Electronic Programmable Fault Box for ECM and HVAC comes standard with computer software that allows remote control of the fault box from a laptop or desktop computer. The Electronic Programmable Fault Box for ECM and HVAC is designed to allow remote system fault insertion into the 2.2L engine bench. The fault box can also be controlled at the fault box installed on the engine bench. The fault box comes equipped with a lockable door.
Educational Advantages:
Provides student learning opportunities for diagnostic skills without the need of an entire vehicle.
Intermittent faults can be inserted with individual adjustments for fault duration and duty cycle.
Allows the insertion or removal of component and/or system faults without having to replace or disconnect components.
Engine systems and components respond to inserted faults with real-world operating symptoms, OEM DTC and scan tool operation.
Features:
16 Engine faults dealing with sensors, components and wiring
Software to allow control of the fault box from a remote computer
Eight faults controlling open circuits in components and sensors
Eight faults with variable adjustments of voltage and/or conditions
Intermittent fault conditions of all 16 programmed faults
Lockable door cover
USB receptacle for remote hookup
Any number of faults can be inserted at the same time.
