Autoranging DC Power Supply
Autoranging DC Power Supply
Each LAB-AUTO has an extensive feature set. The unit's autoranging output allows for many more voltage/current combinations than a traditional DC source.
|Power:||0 to 5.1kW||0 to 15.3kW|
|Voltage:||0 to 84V||0 to 1575V|
|Current:||0 to 24.1A||0 to 567A|
|Standard Control:||Touchscreen HMI, Ethernet|
|Optional Control:||Isolated Analogue, RS-422, RS-485, USB|
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The LAB-AUTO's autoranging output allows for many more voltage/current combinations than a traditional DC source. Each unit has an extensive feature set as standard.
An extensive feature set includes constant voltage, current and power modes, as well as adjustable internal resistance. Models with solar array simulation functions are optionally available. Remote sense compensation up to 5V is possible for applications with long cables prone to unwanted voltage drops.
- Back EMF Protection up to PSU's Nominal Voltage
- <1.5ms for 10-90% Load Step
- Configurable OCP, OVP and OTP
- Adjustable Voltage Ramps
- Adjustable Resistance
- Active PFC of >0.95
Up to 100 LAB-AUTO systems can be arranged in parallel to 1.5MW. Each PSU is able to operate independently, so that systems can be reconfigured, expanded or broken up as needs dictate.
The modular approach is useful for test houses and research labs who regularly test different sized power devices. Individual units can be used for the day to day testing of multiple small devices, then grouped together for larger projects.
Operating Ranges and Features
Up to 8000 sets of programmed memories for V, A, W and time values can be stored within the units internal memory. This allows common test routines to be executed at the touch of a button.
Every LAB-AUTO features an autoranging output. This allows many more voltage/current combinations at nominal power than a traditional DC source. An example of the difference is shown below using a LAB-AUTO 80-540.
Using one autoranging PSU instead of several traditional DC sources saves both cost and bench space. Despite the units offering such a large output range, they are still incredibly power dense. 15kW of output power is provided from 3U of rackmounting height.
Users can nominate an operating mode to take priority over others when testing specific types of load. For example, using the Constant Current priority output mode eliminates overshooting when testing a capacitive load or diode.
All units operate from a three phase wide AC input with an active 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. 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.
The inbuilt active PFC is also ideal for operating the power supply from a generator. Generators tend to be sensitive against high current peaks, and their voltage controllers may have some stability problems with non-sinusoidal load currents. The PFC feature forms a lowpass filter and therefore, both the repetitive current peaks and also the harmonic content is enhanced. This will help the generator system maintain a stable and reliable output voltage during load step changes.
Interfaces and Control
Control of the system is provided via a large touch screen with 5 digit V, I and W display, as well as by analogue knobs. A LAN interface allows for remote control, with other interfaces optionally available.
Operating software is provided to set and monitor live values. A sequencing function is provided so that the LAB-AUTO can follow pre-determined voltage and current curves. Data can be recorded and recalled via a USB stick.
APPLICATION SPECIFIC GUIs
A specialised PV simulation software package is provided when option /PV is selected. This allows the power system to simulate a generator's MPP tracking in constant current, voltage and power modes. Up to 8192 data points can be set so that a smooth and realistic waveform is generated.
Safety and Protection
Over-voltage and over-current protection limits can be adjusted to help safeguard sensitive loads. Ramp profiles and slew rate are also programmable.
When the LAB-AUTO is powering an inductive load such as a DC motor, a back EMF may be uninteionally generated when the output voltage is switched off. An inbuilt freewheeling diode protects the power supply against damage by a back EMF.
Form Factor and Enclosures
Each LAB-AUTO comes in a 19" rackmounting case. Units can be treated to a laboratory rack or flight case integration. Having a programmable power system mounted into a flight case on castors is often advantageous, especially when several departments or test cells share the same equipment.
Multiple power systems can be fitted into the same flight case. Door hangers are fitted for convenience. Existing ETPS systems can also be retrospectively integrated into new flight cases where requested.
|Max Power||Voltage Range||Current Range|
|LAB-AUTO 80-180||5.1kW||0 - 84V||0 - 189A||Add|
|LAB-AUTO 250-60||5.1kW||0 - 262.5V||0 - 63A||Add|
|LAB-AUTO 350-42||5.1kW||0 - 367.5V||0 - 44.1A||Add|
|LAB-AUTO 500-30||5.1kW||0 - 525V||0 - 31.5A||Add|
|LAB-AUTO 650-23||5.1kW||0 - 682.5V||0 - 24.1A||Add|
|LAB-AUTO 80-360||10.2kW||0 - 84V||0 - 378A||Add|
|LAB-AUTO 250-120||10.2kW||0 - 262.5V||0 - 126A||Add|
|LAB-AUTO 350-84||10.2kW||0 - 367.5V||0 - 88.2A||Add|
|LAB-AUTO 500-60||10.2kW||0 - 525V||0 - 63A||Add|
|LAB-AUTO 650-46||10.2kW||0 - 682.5V||0 - 48.3A||Add|
|LAB-AUTO 1000-30||10.2kW||0 - 1050V||0 - 31.5A||Add|
|LAB-AUTO 80-540||15.3kW||0 - 84V||0 - 567A||Add|
|LAB-AUTO 150-180||15.3kW||0 - 262.5V||0 - 189A||Add|
|LAB-AUTO 350-126||15.3kW||0 - 367.5V||0 - 132.3A||Add|
|LAB-AUTO 500-90||15.3kW||0 - 525V||0 - 94.5A||Add|
|LAB-AUTO 650-69||15.3kW||0 - 682.5V||0 - 72.4A||Add|
|LAB-AUTO 1050-42||15.3kW||0 - 1102.5V||0 - 44.1A||Add|
|LAB-AUTO 1500-30||15.3kW||0 - 1575V||0 - 31.5A||Add|
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