NN Power Planner

All induction motors become inefficient when running under load. In the absence of an Intelligent Motor Controller, the maximum amount of voltage & current is supplied to the motor even when the torque requirement has changed. NN Power Planner optimizes the energy consumed by the motor by providing a thyristor-based voltage control. Electric motors consume more electricity than everything else combined; yet international bodies calculate that around 50% of electric motors consume more electricity and it could be saved by improved efficiency using alternative energy engineering systems.

The fact is that government bodies are increasingly promoting more efficient use of energy; energy conservation, efficient energy management, energy efficient products - they are looking at the energy crisis in general. Environmental concerns continue to make headlines.

So it is perfectly clear if you could reduce the amount of electricity drawn by an appliance, and still enable it to do its job properly, you'd open up an immense marketing opportunity that could potentially generate huge profits for your business. NN Power Planner is a remarkable energy saving invention which is based on THYRISTOR based voltage control that reduces the electricity drawn by most industrial motor driven equipment ensuring efficient energy management in order to reduce electricity costs.

For three phase induction motors of 5HP - 600 HP
Energy saving to a substantial amount.
Soft start/stop feature with ramp time setting range of 0.5 - 120 seconds.
Suitable for three phase, 415 volts ( +/- 10%), 50 Hz (+/- 3%), supply.
Pedestal voltage 30%-70% of supply voltage
Unique additional programmable features.
Protection for Phase loss, short circuit thyristors.
Suitable for +10 to +50 degree centigrade and up to 95% humidity.
Enclosure IP20/IP 42

Die Casting Machines
Grinding Machines
Hydraulic Presses
Injection Molding Machines
Industrial Saws
Lathe Machines
Mixing Machines
Milling Machines
Pulper
Reciprocating
Sheet Cutting Machines and many more...

 NN Power Planner provides dynamic control of a motor across a wide range of applications and conditions
 The unique control software continuously monitors motor efficiency
 NN Power Planner ensures the right amount of power is used
 NN Power Planner recognizes slight change in demand and responds immediately within 1/100th part of a second
NN Power Planner delivers a controlled release of power to the motor
Provides smooth acceleration and deceleration
NN Power Planner extends motor life

A) Electrical Advantages:
 Reduces starting current
 Improves supply stability and in case the motor is running by DG sets, frequent DG trippings are eliminated.
 Allows more equipment to be connected across the supply.
Increases motor life.
Reduces Energy Consumption
 Allows motor to START-STOP approx. 250 times in 24 hours.


B) Mechanical Advantages:
Reduce starting torque and matches load torque with motor torque.
Prolonged life of drive equipment due to soft start and soft stop feature & hence reduces maintenance.
Reduction of excessive heat, noise and vibration.
Improves motor life.

C) Economical Advantages:
 Reduces Peak Demand
 Improves motor Power Factor
 Reduces motor losses -Saves Energy
 Reduced Maintenance cost

How NN Power Planner Works?

In common with all soft start devices NN POWER PLANNER uses Thyristors to accurately control the voltage applied at the motor terminals.

The characteristic of the Thyristor to switch rapidly from "OFF" to "ON" when pulsed, and to remain "ON" until the current through the device falls to zero at the end of each half cycle in the AC supply, is called self commutation.

By controlling the switch-on point relative to the voltage zero crossing in each half cycle of the supply, it is possible to regulate the current flowing through the thyristor. The closer the turn-on point is to the end of the cycle the smaller the value of current that will be allowed to flow. Conversely, the closer the turn-on point is to the beginning of the cycle the higher the value of current will be. Using this principle and by connecting two Thyristors in anti-parallel to each of the phase connections to a motor NN Power Planner continuously adjusts the voltage to the motor terminals by precisely controlling the Thyristor turn-on points. This provides just sufficient voltage for the motor to accelerate the load.

Energy Savings
When working at or near full load, the typical 3-phase induction motor is relatively efficient, achieving efficiencies of between 80% to 92%. However, motor efficiency falls dramatically when the load falls to less than 50% of rated output. In fact, very few motors actually experience consistent fully rated operation, the vast majority operate at much lower loads due to either over-sizing (a very frequent situation), or natural load variations.

Where motor speeds cannot be varied, the optimization software in the NN Power Planner will produce energy savings in lightly loaded motors.

Less sophisticated soft-starters remain at full conduction and the motor then behaves as if it were connected directly to the mains supply. However, at low loads on full mains voltage, induction motors always have excess magnetizing current. By detecting the load at any instant, and adjusting the motor terminal voltage accordingly, it is possible to save some of the excitation energy and load loss, and improve motor Power Factor when the motor is running inefficiently at almost no load.