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What kind of signals are provided by sincos encoder and how to connect them to sincos encoder card?
There are many types of sincos encoder. What they have in common are sinus and cosinus signals and supply voltage.
Sinus and cosinus signals are usually differential and labeled as SIN+, SIN-, COS+, COS-, but sometimes S+, S-, C+, C-. If the sincos encoder has signals described as A+, A-, B+, B-, then A+, A- are cosinus signals and B+, B- are sinus signals.
Suply voltage pins are easy recognizable, typically V+ and 0V
Depending on encoder type, there might be addtional (optional) signals.
Zero signal (differential) ususally with label R+, R- is a signal that occurs once per revolution. Sometimes also called reference signal. Zero signal in sincos interface is analog, but in digital encoders, zero pulse is digital signal.
Encoder may provide both sincos and EnDat signals. To process EnDat signals, the encoder card must provide EnDat interface. EnDat signals are D+ (data+), D- (Data-), CL+ (clock+), CL-(clock-). SinCos encoder cards that do not have enDat interface will work with such an encoder, but only sincos signals will be processed. (EnDat signals will not be connected)
Encoder type may be sincos hiperface. In this case hiperface signals (Data+ and data-) are added to sinus and cosinus signals. Data+ and data- as part of hiperface inteface helps VSD to automatically identify encoder type and very often hiperface serves also motor data.
Commutation signals may exist in encoders that are already linked to synchronous motors or brushless DC motors by motor manufacturer. Commutation is a process of putting current into correct motor windings for correct positioning. More often used in resolvers. Commutation signals are usually marked as C+, C-, D+, D-
If encoder passed temperature value from motor temperature sensor, there will be a Temp+ and Temp- signals.
Example for conenction ERN487 sincos encoder to VW3A3409 card is in attachment.
Sinus and cosinus signals are usually differential and labeled as SIN+, SIN-, COS+, COS-, but sometimes S+, S-, C+, C-. If the sincos encoder has signals described as A+, A-, B+, B-, then A+, A- are cosinus signals and B+, B- are sinus signals.
Suply voltage pins are easy recognizable, typically V+ and 0V
Depending on encoder type, there might be addtional (optional) signals.
Zero signal (differential) ususally with label R+, R- is a signal that occurs once per revolution. Sometimes also called reference signal. Zero signal in sincos interface is analog, but in digital encoders, zero pulse is digital signal.
Encoder may provide both sincos and EnDat signals. To process EnDat signals, the encoder card must provide EnDat interface. EnDat signals are D+ (data+), D- (Data-), CL+ (clock+), CL-(clock-). SinCos encoder cards that do not have enDat interface will work with such an encoder, but only sincos signals will be processed. (EnDat signals will not be connected)
Encoder type may be sincos hiperface. In this case hiperface signals (Data+ and data-) are added to sinus and cosinus signals. Data+ and data- as part of hiperface inteface helps VSD to automatically identify encoder type and very often hiperface serves also motor data.
Commutation signals may exist in encoders that are already linked to synchronous motors or brushless DC motors by motor manufacturer. Commutation is a process of putting current into correct motor windings for correct positioning. More often used in resolvers. Commutation signals are usually marked as C+, C-, D+, D-
If encoder passed temperature value from motor temperature sensor, there will be a Temp+ and Temp- signals.
Example for conenction ERN487 sincos encoder to VW3A3409 card is in attachment.
Gepubliceerd voor:Schneider Electric Belgium
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