Our rental systems can be combined in series, parallel or matrix configurations with any LAB-TC modules you have previously purchased, providing they have the same nominal outputs.

Internal Resistance Range

Each module is supplied with with a user programmable internal resistance range as standard. This makes the power supplies ideal for simulating the ouput of energy storage devices such as battery packs, fuel cell stacks and super capacitors.

Sense Compensation

Sense plus terminals are built into the LAB-TC for the connection of sense wire which compensates for voltage drops in the load lines. This has a number of advantages over traditional sense. It is permitted to interrupt the load line during operation (voltage on). The maximum voltage drop compensation is adjustable. 

The voltage difference between LAB-TC output and sensing point is monitored. If a set limit is exceeded, the LAB-TC unit shuts off. This is particularly useful for applications with long cables often prone to unwanted voltage drops.

Versatile Limit Setting (VLS)

The VLS allows the LAB-TC's output relays to be activated automatically when specific output values are met, protecting the DUT from any damaging charge conditions. Output voltage, current and power values which exceed or fall below a given limit or operating window can be programmed to trigger the relays. Active and inactive areas of operation are defined by a limit value, hysteresis value or a directional designator for the hysteresis.

Constant voltage, current and power operating modes are provided. The internal resistance can be adjusted making the LAB-TC range ideal for battery simulation.

For systems with bidirectional source and sink capabilities please see our separate LAB-GSS rental product family.

AC Cables

All rental LAB-TC systems are provided with AC input cables as standard.

Power Factor Correction

LAB-TC modules have a Power Factor Correction (PFC) circuit integrated into the input stage as standard. This enhances the overall efficiency of the modules across the output power range when compared to a unit that does not have PFC. 

The current harmonics of the LAB-TC meet the EN61000-12 regulations for a mains SCE >=120 value. In practice, this means a significant lower peak current value, a decrease of RMS value of the phase current and less perturbations of other equipment running on the same grid.

As standard each module is supplied with isolated analogue and RS-232 interfaces. Other methods of control are possible depending on module availability including front panel control and display, as well as USB. 

RS-232 Interface

The RS-232 interface is configured as a Sub-D 9 pin connector (female) and is located on the front panel. The graphical user interface, TopControl is operated via RS-232. The software runs on Windows and allows the user to control, measure and configure the power system.

Analogue Interface

The control port is configured as a Sub-D 25 female connector and is located on the rear panel. It allows output values to be set and read proportionally using a 0-10VDC analogue signal. Digital inputs and outputs enable various functions such as the interlock and output ON/OFF. A 10VDC reference is provided for analogue control. Digital functions are switched via a high/low signal. A 24VDC supply voltage is provided for these functions.

Standard TopControl GUI

All LAB-TC units come with a simple and intuitive TopControl operating GUI. Live values of the power system are displayed graphically along with any warning and error messages. The software provides a variety of second level parameters, ideal for users who like to optimise their test processes. In standard user mode the operator can remotely program set values, enable voltage output as well as the ability to anlyse different variables including set and actual values via the integrated scope.

The scope function can simultaneously record up to 8 system variables. Recording can be started manually or by a defined trigger event from any variable of the system. All actual and set values (currents/voltages/power/internal resistance) can be recorded. Other recordable items include system temperatures, intermediate DC circuit, low voltage auxiliary power supplies, error related values and variables from the controller section. 

A password protected section is available to the advanced user and service technician. In addition to the standard functions the authorised user is able to:

• Program linear ramp functions at start up and set value steps during operation
• Configure multi-unit operation
• Program the PID controller parameters
• Program the unit's limit values
• Calibrate and adjust values as necessary
• Update the firmware

Function Generator

An embedded function generator is available with selected modules which allows complex DC waveforms to be implemented. The highly programmable nature of the function generator allows users to plot out exact waveforms. This is often advantageous when emulating a power device with a very specific behaviour profile. For example, when quality testing fuel cell powered equipment, the specific behaviour of a discharging fuel cell can be programmed and replicated.

As well as custom shapes, standard square, sawtooth and sine waveforms can be plotted against time. Voltage/current and voltage/power relationships can also be programmed where necessary. Parametric programming is possible, where instead of the time axis, an input variable V_IN, I_IN or P_IN can be selected.

On request, additional application GUIs can be provided with LAB-TC rental modules, which allow real world behaviour of a power component to be replicated. Please let us know beforehand if you require a specific GUI for your test set-up.

Battery Emulation

BatSim provides a convenient method for the LAB-TC to emulate the output of different sized battery stacks. Nearly all relevant electrical characteristics are programmable, including the number of cells, energy capacity, cut off limits, chemistry type and nominal voltage.

Electric/Battery Drive Cycling

Drive cycle tests can be implemented using BatControl. Previous data obtained from a test track can be imported and recreated, allowing the LAB-TC to simulate a real world driving test inside a lab environment. Battery charging profiles can also be implemented through the GUI.

Capacitor Simulation

The output characteristics of a real capacitor stack can be emulated when CapSim is installed with LAB-TC modules. Number of cells in series/parallel, state of charge, cell cut off limits, dynamic capacitance and resistance are programmable.

Solar Array Simulation

SASControl software has all EN 50530 tests pre-installed. The GUI allows users to edit irradiance, temperature and amplitude values. Previous tests have been conducted using over 400,000 invividual data points, with more possible.

All modules are shipped in flight cases which make deployment of the power systems simpler, quicker and safer.

A selection of safety features are provided, which vary by flight case. These include a status indicator that alerts users of any residual energy on the DC link that is greater than 15V. This operates even if the mains power is turned off. Another indicator assesses the quality and correct rotation of the AC input voltage and illuminates if correct. 

Panel mounted DC sockets are available which are both mechanically keyed and colour coded to eliminate any possible user errors. A rack mounted switch panel is provided for selected cabinets, allowing users to switch between parallel and series configurations. 

If you are looking to purchase a system, new LAB-TC modules can be found in our DC sources range.

The versatile programming capability of the LAB-TC ensures that it is popular across many research and development sectors. Common applications include battery/capacitor emulation, implementing drive cycles, fuel cell loading, testing flywheels, battery charging, component lifetime testing, as well as the testing of inverters and DC-DC converters.

A LAB-TC system was used by Durham University for the characterisation of magnetic devices. The DC source allowed them to validate and understand the limitations of their numerical models, while ensuring confidence in a specific device design.

Cranking Curve Testing

Electrical components within a vehicle's subsystem must be able to withstand a wide range of input voltage surges and drops during a start-up. The LAB-TC can accurately recreate these conditions within a lab environment. This increases reproducibility and accuracy of results when compared to using real batteries.

Hard to replicate conditions such as voltage cranking during a cold start can be achieved. Voltage/current and voltage/power relationships can be programmed against time where necessary.

Voltage Drops and Interrupts

In electronic systems sudden voltage interruptions may cause unexpected behaviour. Supply line disturbances may have several causes, including an additional switch on of large capacitive loads parallel to the supply line or a short circuit caused by loads sharing the supply. The LAB-TC can generate many complex DC waveforms to test devices under realistic conditions to identify any potential issues.