Measure up to ±1,500 A in automotive traction inverters
Automotive traction inverters are getting more and more compact, and more and more powerful.
Limited space, cross talk from busbars getting closer, noise caused by high voltage fast switching are all challenges that the HSTDR is able to address.
While traditional C-core sensors are rather bulky because they need a large aperture to slide onto complex busbars, the LEM HSTDR with integrated busbar can be placed easily anywhere in the inverter with a package up to 75% smaller.
Despite its small size, the LEM HSTDR current sensor is able to measure accurately up to 1500A without saturation. Also, the core design with small airgap offers an excellent protection against cross talk.
Relying on open-loop Hall effect technology, the HSTDR product series is suited for DC, AC, or pulsed current measurement in high power and low voltage automotive applications such as motor control.
AN INTEGRATED BUSBAR FOR A SMALL FOOTPRINT AND A HIGH PERFORMANCE
This current transducer’s design with an integrated busbar allows to shrink the aperture of the magnetic core and to significantly reduce size and weight of the sensor compared to a traditional C-core sensor.
The HSTDR is only 29x21x12mm for 27g while it can measure up to 1500 A with an excellent immunity against cross talk thanks to an air gap comparable to C-shape cores.
HSTDR – Features and benefits
HSTDR benefit from a highly flexible design for EV traction inverters.
Features
- Open Loop transducer using the Hall effect sensor
- High insulation level
- Primary current measuring range up to ±1500 A
- Output voltage: fully ratio-metric (in sensitivity and offset)
- Optimized footprint, weight and cost
- Easy to integrate thanks to a design with integrated busbar
- A fully calibrated package (core + busbar + sensing element) for a faster time to market
- Great performance (measuring range increased +50% compared to HSNDR, best in class accuracy)
Main Benefits
- Excellent accuracy
- Very good linearity
- Very low thermal offset drift
- Very low thermal sensitivity drift
- > 40kHz bandwidth with 3μs fast response time.
- No insertion losses
Typical applications
HSTDR current sensors, known for their proficiency in measuring DC, AC, and pulse currents, are widely employed in a range of automotive settings.
Instances of these applications include:
- Starter Generators
- Inverters
- HEV applications
- EV applications
- DC / DC converters
- DC link
HSTDR Current Sensor - High-Performance EV Traction Inverter Solution
LEM HSTDR – Download & Technical Characteristic
| Product | Order | Document | Primary nominal RMS voltage | Supply Voltage range | Op. Temperature |
|---|---|---|---|---|---|
| HSTDR 1200-000 | Datasheet Application Note | 1200 A | 5 to 5 | -40 to 125 °C |
Current Sensors Comparative Chart – HSTDR, HSNDR, HAM
Product Series | Measuring range | Total Error | Package size | Bandwidth | RMS | Creepage / CTI | Special feature |
|---|---|---|---|---|---|---|---|
| HSTDR | +/- 1500 A | < 3.5% | 29x21x12mm | > 40 KHz | 4.7kV | 16.5 mm / PLC3 | Super compact size |
| HSNDR | +/- 1000 A | < 3.5% | 34x21x18mm | > 40 KHz | 2.5kV | 5.12 / PLC0 | Dual output for different rages or redundancy |
| HAM | +/- 250 A | < 3.25% | 37x28x17mm | > 500 KHz | 2.5kV | 4 mm / PLC3 | High bandwidth > 500 MHz |
LEM proposes a full range of single phase or multiphase sensors for automotive motor control and energy conversion.
HSTDR sensors – ASK FOR SAMPLES / QUOTATIONS
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