Unidrive Classic Low Voltage Size 1 to 3 Installation Guide, 1, pdf, MB, EN, Download. Unidrive Classic Regen Installation Guide, 2, pdf, MB, EN. Unidrive SP High Frequency (Size 1 - 6) User Guide, 15, pdf, 31 MB, EN, Download. Unidrive SP Low Frequency Free Standing Size 6 - 9 User Guide, 3, pdf. Brochures. Click here to download Control Techniques Brochures. User Guides. Title, Issue, File Type, Size, Lang. Unidrive M/ Control User Guide, 3, pdf .

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Unidrive SP Elevator Solutions Software Low Frequency, 4, pdf, 9 MB, EN, Download. Unidrive SP Free Standing Size 6 - 9 User Guide, 2, pdf, 22 MB, EN. You must be logged in to download files. If already registered, you can login using your email address in the text box below. If you haven't registered yet, please. User Guide. Unidrive. Model sizes 1 to 5. Universal Variable Speed AC Drive (A). Typical. Input current. (A). @V @V. kW hp. 1.

Supply Loss It should be noted that the over-current condition will only be reset automatically ten times in any 10s period before an OI ac trip is produced. If an over-current trip occurs the system will attempt to resynchronise. If Supply Voltage Detection Bus Voltage For Supply Voltage Detection The system will simulate the supply angle based on the supply conditions before the overcurrent condition and restart the system within 10ms.

If supply loss is detected the system will simulate the supply angle based on the supply conditions before supply loss was detected. This allows the inverter to remain active during the supply loss period and it is possible for reactive current to flow into the supply in the normal way, but the active current is held at zero.

As the active current is held at zero the d.

Regen Supply Loss a. Level If Supply Loss The diagram below shows the timing and minimum voltage envelope for auto-synchronisation.

If the required timing and voltage for transient fault ride-through lies within this envelope then the auto-synchronisation can be used to meet the requirements. The maximum time between point 'A' and point 'B' is 8ms, but this may be shorter depending on the size of the current transient caused by the fault. If the current transient exceeds the over-current threshold then the system will take 8ms to recover, otherwise there is no delay and the regen system will remain active thoughout the fault.

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During this period active power flow is not possible as it is disabled by the regen system. If the supply voltage remains below Regen Supply Loss a.

Once the supply voltage has risen above Regen Supply Loss a. The request for reactive and active power must be made by the user during supply tranisent ride-through.

The Voltage Set Point The default values can be used with most supplies giving a reasonable level of control headroom. The power input parameters Power Input 1 If possible the power feed forwards should be used so that the PI controller is simply providing a trim to the d. In most cases the default voltage controller gains can be used, however the effect of the gains and the response of the voltage controller is discussed below.

If the power flow from the d. If the power flow to the d. If the peak of the d. A rapid transient where power into the d. The example shown is for a very rapid load change where the torque reference of the motor drive has been changed instantly from one value to another. In the example given there is a very rapid change of power flow. The transient d. For example a filter could be included between the speed controller and current controller in the motor drive with Current Reference Filter 1 Time Constant In most cases it is not desirable to reduce the performance of the motor drive, and so as already mentioned the best solution is to use a power feed forward term from the motor drive.

So far the discussion has been related to the d. If the default voltage controller gain is used and it is possible to obtain a stable response from the current controllers with their default gains then the voltage controller response will be stable.

However, in some cases it will be necessary to reduce the current controller gains to make these controllers stable, in which case it is likely that the voltage controller gain will need to be reduced to make this controller stable. It is possible to disable the d. This sets both the proportional and integral gains to zero.

Once the controller is disabled the flow of power through the regen drive can be defined using the power input parameters Power Input 1 This method of control can only be used if the d. An external soft start resistor or the thyristor charging system in the drive may be used. This is demonstrated by the simplified charge system diagram below. It should be noted that this is used to show the connections required between the charge system and the drive, and does not show a complete power circuit.

Unidrive M Reference Guide 25 26 It is possible that the charge circuit could be damaged if the motor drive is active while the charge circuit has not been bypassed or disconnected. It is also necessary to pass an indication of the state of the charge system and the Regen system to the motor drive. The "synchronised" indication is used to enable the motor drive, so that it will only be enabled when the charge system is disabled and the regen system is enabled and fully synchronised.

The Motor Drive is always disabled unless the charge circuit has been bypassed and the Regen drive is synchronised, however it is possible to use auto-synchronisation Regen Syncronisation The connection between the drives should be as follows.

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When the supply loss occurs the Regen drive will stay active and indicate to the Motor Drive that supply must stay active until ms after the supply has recovered. When the d. The Motor Drive will stay in supply loss mode and not take power from the supply until ms later when the system can operate normally again. If Power Output If this signal is connected to an analogue input on the regen drive, the input is routed to Power Input 1 Motor drive Full Scale Current Kc The default value for Power Input 1 Scaling Up to 3 motor drives connected to the regen drive d.

It should be noted that a maximum of two analogue inputs are provided on the drive with us update rate. If the third input is used the update rate is 4ms, and so this should only be used for a motor drive with limited dynamic performance. If more motor drives are connected to the d.

The power in kw can be transferred from each motor drive using fast synchronous communications to an application module in the regen drive. The total power in kw should be calculated by the applications module and then written to the Power Input kw It should be noted that the polarity of all the power feed-forward parameters is that positive values cause power to flow from the supply and negative values cause power to flow into the supply Current Trim Type 8 Bit User Save Update Rate Background read A current feedback trimming routine runs before the regen drive is enabled to minimise offsets in the current feedback.

If Current Trim The current offset trim is only carried out when the charge system is enabled contactor open as this minimises current flowing into the inverter terminals due to noise on the supply that may disturb the current offset trimming.

Current Trim To ensure that the current offset trim is not disturbed by noise on the supply, the charge system is enabled before the current offset trim and then disabled again before the regen drive goes into its active state. This causes the charge system contactors to switch each time the regen drive is enabled. If Power Input When this component is positive the reactive current flowing from the supply to the regen drive lags the voltage.

When this component is negative the reactive current flowing from the supply to the regen drive leads the voltage. Reactive component control can be used even if the d. If Reactive Power Input The regen drive includes an additional system to reduce imbalance, 5th harmonics and 7th harmonics in the a.

Harmonic Reduction Enable It should be noted that the regen system intput filter will absorb 5th and 7th harmonic currents if there is 5th or 7th harmonic supply voltage distortion.

The regen drive cannot reduce this current, but can minimise the 5th and 7th harmonic current due to 5th and 7th harmonic voltage distortion between the supply and the inverter.

Harmonic Reduction Enable Distortion reduced It should be noted that Phase Loss Each of the additional controllers used to minimise currents due to imbalance, 5th and 7th harmonic distortion have an integral controller similar to the controller for normal supply frequency currents. The gains for the 5th and 7th harmonic current control are at a fixed low level, however, the gain for minimisation of currents due to imbalance can be adjusted by the user with Negative Phase Sequence Current Gain The default value is low, and so the response due to a change in supply imbalance is relatively slow.

For most applications the gain can be left at the default level, but where a fast response is required, i. Negative Phase Sequence Current Gain Care should be taken when increasing this value as the system stabilty may be reduced particularly with a weak supply Voltage Ramp Time Minimum 0.

The voltage controller is then enabled and attempts to raise the d. The voltage reference is ramped up to the requried level at a rate defined by Voltage Ramp Time The default value of 1. If a shorter synchronisation time is requried then the ramp rate can be increased, however care must be taken to avoid over-voltage trips particularly if a high level is used for the d.

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If a faster ramp rate and high set-point are required it may be necessary the increase Voltage Controller Proportional Gain Kp The supply voltage must rise above Regen Supply Loss a.

When the system is not synchronised Estimated Supply Voltage This ensures a correct estimate because the supply voltage has stopped causing the d. When the system synchronises Estimated Supply Voltage It should be noted that if the supply is removed and then re-applied before the d. If this occurs the measured d.

As the accuracy of measured supply voltage is not critical in setting up the current controllers etc. If it is a problem then Supply Voltage Detection This can either be set to a fixed value or it can be controlled from voltage magnitude feedback via an analogue input.

When this setting is used the system does not wait for the d. However, the system will continuously attempt to resysnchronise after the supply is removed.

It is likely that some transient voltages will occur at the inverter terminals as the d. As well as being used to give the supply loss condition, Estimated Supply Voltage During synchronisation the full value of Estimated Supply Voltage After automatic reset of an over-current condition then Estimated Supply Voltage By using half the nominal supply voltage the current transient is minimised for either condition. A margin of 5Hz or more should be allowed outside the likely supply frequency range to enable the Regen system to operate.

If the Regen system supply frequency is within approximately 5Hz of either limit for ms the system will not remain synchronised and will attempt to re-synchronise.

1. Library Contents

The frequency limits are important if the supply is removed when the Regen system is active, as the system could remain active, particularly if energy is fed into the d. If Regen Maximum Voltage If Regen Minimum Voltage The Island Detection Level The following should be noted: 1. It is possible that high levels of active current that contain components similar to the injection frequency may cause false detection of an island condition and this is more likely the higher the injection frequency.

The detection system will detect an island condition in a time from 3 to 4 cycles of the injection frequency, therefore a higher injection frequency gives faster detection. Changing Island Detection Injection Frequency The injection frequency used by the island detection system affects the maximum island detection time as given in the table below: Injection frequency 1Hz 2Hz 4Hz Maximum detection time 4s 2s 1s For the island detection system to comply with IEEE the detection time must be 2s or less, and so an injection frequency of 2 or 4Hz must be used.

This allows the injected current from a number of Regen systems to be synchronised to a master clock. If the option module does not provide a suitable clock then the frequency is defined by the Regen system.

The source being used is given in Island Detect Synchronisation Source As the current decays energy is transferred from the supply to the d.

To prevent an over-voltage trip during synchronisation or re-synchronisation the system will prevent this process from starting if the d. For example the full scale d. If the recommended components are connected between the supply and the regen system the rise in the d.


If alternative inductors are used that are significanlty larger than the recommended values or the supply inductance is very high it may be necessary to increase the headroom. The regen system supply voltage cannot contain any zero sequence components because there is no neutral connection.

The negative phase sequence component is an indication of the level of supply imbalance. Positive Phase Sequence Volts Note that Negative Phase Sequence Volts The active current reference is normally produced by the d.

The reactive current reference is either defined directly from the Reactive Current Reference See Menu 3 for more details. Drive rating information Current rating The drive output currents can be represented as a vector.

The limits and the scaling applied to the drive output currents are defined by the magnitude of this vector as shown below.

Unidrive M - Delivers increased machine performance with sensorless induction and sensorless permanent magnet motor control, for dynamic and efficient machine operation. Unidrive M - Delivers maximum machine throughput through greater control with single and multi-axis network synchronization. Unidrive M - The M is a special version of M, fitted with an alternative IO that adds a 4 to 20 mA current loop selection to the analog outputs and 2 change over relays.

Unidrive HS70 - A high-speed variant of the Unidrive M and delivers maximum machine throughput through greater control with single and multi-axis network synchronization. Unidrive HS71 - A high-speed variant of the Unidrive M and delivers maximum machine throughput through greater control with single and multi-axis network synchronization.

Unidrive HS72 - A high-speed variant of the Unidrive M and delivers maximum machine throughput through greater control with single and multi-axis network synchronization. Powerdrive F - Designed to control all AC induction motors and sensorless permanent magnet motors on the market. Even greater performance and energy efficiency savings can be achieved with our Dyneo package which includes the Powerdrive F and the LSRPM permanent magnet motor.

Unidrive E - The E Elevator Drive is dedicated to the elevator industry, taking speed and ease of set-up, ride comfort and energy efficiency to new heights. This new generation of elevator drives has been designed after extensive market research, meaning the latest key features and innovations required by customers are included.

The E drive further enhance Nidec Control Techniques market leading position, built on the globally installed customer base and reputation for ride comfort, high level of service and robust, reliable and dependable products.

The H drive dimensions are among the smallest in class at every power rating. This saves valuable building real estate, makes the drives easy to handle and maximizes mounting flexibility. Digitax M - The M is a compact universal drive, optimised for high-dynamic servo applications and multi-axis configurations. Delivers maximum machine throughput through greater control with single and multi-axis network synchronization.

Option module support offers maximum flexibility in machine design. KB G3 - The G3 minimizes machine downtime with its optional intuitive advanced LCD keypad which offers real-text multi-language display for rapid set-up and superior diagnostics.Note: Any parameter changes that have not been saved will be lost during this action. The default values can be used with most supplies giving a reasonable level of control headroom.

As the active current is held at zero the d. As the accuracy of measured supply voltage is not critical in setting up the current controllers etc. MCi IP Address - Addresses are configured in the Advanced Link Editor and stored within an application, users should note that on module reset the address is reapplied. The following points should be noted: 1.