NS20

Outside Dimensions
Main Specifications

*NS20 has been discontinued. The successor model will be NS20-A.

The non-switching driver NS20 is ideal for disk inspection equipment that dislikes noise when combined with a small air spindle!

Noiseless non-switching operation: Inheriting the traditional features, the noise generated is extremely small. The power element that drives the motor operates in a non-switching (linear) manner.

Expansion of PLL control range: We have improved the PLL control circuit of the conventional product "NS35" and can now rotate stably over a wider speed range. By the way, the speed fluctuation rate is less than 0.001%.

High response current control

You can also drive the motor in torque (current) control mode. The control cycle of the control loop is as short as 10μs, enabling highly accurate control. Also compatible with CLV (constant linear velocity control).

*CLV (Constant Liner Velocity):
In disk inspection equipment such as HDDs and DVDs, rotation control that changes the rotational speed of the disk depending on the position of the head and maintains a constant speed at which the head traces the disk.

Expansion of motor compatible range, expansion of encoder pulse compatible range: The number of motor poles corresponds to all the number of poles (4 to 42 poles) of our BUILT-IN DD. The encoder can handle up to 1 million pulses per revolution. Additionally, signal frequencies up to 5MHz can be received.

Miniaturization: Compared to our conventional product "NS35", it is smaller by 43% in volume and 77% in weight.

Compliant with European RoHS Directive: Compliant with the European Union's "RoHS Directive" (directive on the restriction of the use of specific hazardous substances in electronic and electrical equipment).

Outside Dimensions

Main Specifications

Dimensions & Performances		Specifications
Type		NS20
Applicable motor		Three-phase synchronous motor *1
Applicable Encoder		Incremental encoder (maximum 5MHz) *1
Power supply	Main power supply	±24V (8A)
Power supply	Control power supply	5V (1A), ±15V (0.2A)
Control Details	Output current	Maximum 8Apeak (continuous 5Apeak) *2
	Output Stage Method	Non-switching (linear) operation inverter sinusoidal current control
	Control Mode	PLL (Phase-locked Loop) control Synchronized with clock command (line driver) Pulse frequency division function *3 Torque (current) control Analog voltage command (±10V)
	Control Input	Rotation command, direction command, reset, etc.
	Control Output	Encoder pulse (A, B, Z phase), PLL lock, motor stop, alarm, etc.
	Uneven Rotation	0.001% or less *4
	Anomaly Detection	Emergency stop input (air pressure abnormality) Initial operation timeout Abnormal rotation direction Overspeed Motor overheating Driver overheating Power abnormality Displayed on 7segLED etc.
	Abnormal Braking	Dynamic brake (built-in circuit)
Surrounding Envrionmental		Humidity: 85% or less (no condensation) Do not install in an atmosphere harmful to electronic circuits. (corrosive gas, metal powder, moisture, oil, etc.)
Storage Temperature		-20 to 85℃ (no condensation)
Weight		2kg
Dimensions		150mm×91mm×202mm (Does not include protruding parts such as screws and connectors)