The advent of the autonomous car has highlighted the fundamental importance of having good sensors. That being said, we have long been committed to providing effective – and reliable – sensors to our customers. So whether you are looking for engine and transmission sensors, or for comfort and safety – not to mention emissions and e-mobility – you should definitely take a look at our range.
This inductive position sensor meets the need for control of synchronous electric motors used in drivetrains for electric and hybrid vehicles – which are set to increase in number to meet the energy and environmental challenges of the next two decades.
Specifically, the EMPOS enables precise measurement of the rotor’s angular position to optimise the control of the motor’s inverter. An EMPOS offers significant advantages in terms of integration and ElectroMagnetic Compatibility (EMC).
In addition, it incorporates signal processing that allows it to output the angle in both analogue and digital form.
The sensor precisely locates the angular position of a gear wheel attached to the rotor. The position information is then delivered to the electric motor control computer in the form of an analogue or digital signal (12 bits).
INDUCTIVE TECHNOLOGY
The Electric Motor POsition Sensor (EMPOS) comprises an electrical circuit on which the primary and secondary windings are screen printed and connected to the ASIC; i.e., the so-called “proprietary” electronic chip. The whole unit is then packaged in a waterproof case whose durability is adapted to the engine environment.
The inductive technology used has already been proven in production on several “electrified” vehicles; it is designed to work equally well in hybrid and 100% electric applications. In addition, the EMPOS has been designed without a magnet – reducing weight and size compared to a resolver – and offering flexible and adaptable integration at the end and around the rotor.
SYMPTOMS
The following symptoms are frequently associated with an electric motor position sensor failure:
DIAGNOSIS PROCEDURE
The EMPOS differs from the vast majority of other products we offer in that it is extremely complex to test for proper operation. A simple multimeter would not suffice, as only extensive laboratory testing can actually give you this answer. Clearly, if the car code reader indicates a faulty EMPOS, then this part should be replaced without further diagnosis.
CAUSES OF FAILURE
It is possible that an electric motor position sensor is no longer working due to:
INSTALLATION INSTRUCTIONS
To ensure a quick and efficient installation, you must refer to the following instructions:
INSTALLATION TIPS
As this is a sensor directly linked to the electric motor, the person working on this part must have received prior training in the mechanics of electrified vehicles.
PREVENTIVE INFORMATION
The above items are provided for information purposes only. They do not replace the advice of a qualified technician or mechanic. We strongly recommend that you ask a professional if you have any doubts about the operations to be carried out. If you do not, we will not be responsible for any damage to your vehicle.
When an electric motor position sensor fails, the MIL (Malfunction Indicator Lamp) fault signal lights up on the dashboard. The vehicle then loses power, with the motor switching to “emergency” or “limp” mode. Then, depending on fault severity, it may not be possible to restart the vehicle until the faulty sensor has been replaced.
The Electric Motor POsition Sensor (EMPOS) differs from the vast majority of other products we offer in that it is extremely complex to test for proper operation. A simple multimeter or visual inspection would not suffice, as only extensive laboratory testing can actually give you this answer. Clearly, if the diagnostic tool tells you that the EMPOS is faulty, then this part should be replaced without further diagnosis.
Although automotive sensors meet very high standards, they do not last forever, and several elements may require replacement, including deteriorated hoses, cables and/or connectors; but also the sensor element, which can cause the electric motor position to be misread. Sometimes this replacement is due to an accident, directly or indirectly; also, excessive and abnormal vibrations of the vehicle can cause a problem with the fixing of the electric motor position sensor.
We recommend the following steps to replace your electric motor position sensor as efficiently as possible and to limit possible mistakes:
As this is a sensor directly linked to the electric motor, the person working on this part must have received prior training in the mechanics of electrified vehicles.
