Using a VF motor motor for use with inverter | Toshiba VF-nC1

E6581090

Output current reduction factor [%]

VJT×1.0

VJT×0.55

0

30Hz Output frequency (Hz) Note: The motor overload protection start level is fixed at 30Hz.

[Using a VF motor (motor for use with inverter)]

		■Setting selection QNO of electronic thermal protection characteristics
		Setting	Overload	Overload stall
5		value	protection	Overload stall
		value	protection
			○	×
			○	○
			×	×
			×	○

○: valid, × : invalid

A VF motor (motor for use with an inverter) can be used in lower frequency ranges than the general- purpose motor, but if that frequency is extremely low, the effects of cooling on the motor will deteriorate.

■Setting the motor electronic thermal protection level 1 VJT

If the capacity of the motor being used is smaller than the capacity of the inverter, or the rated current of the motor is smaller than the rated current of the inverter, adjust the electronic thermal protection level 1 VJT so that it fits the motor's rated current.

* If the indications are in percentages (%), then 100% equals the inverter's rated output current (A).

Output current reduction factor [%]/[A]

	VJT×1.0
	VJT×0.6
	0	6Hz
		6Hz	Output frequency (Hz)
	Setting of motor overload		Output frequency (Hz)
	Setting of motor overload
	protection start level

2) Inverter over load characteristics

Set to protect the inverter unit. Cannot be changed or turned off by parameter setting.

If the inverter overload trip function (QN) is activated frequently, this can be improved by adjusting the stall operation level H downward or increasing the acceleration time CEE or deceleration time FGE.

Inverter overload

Time [s]
	100%: inverter rated output current
60
0	Output current [%]
110%	150%

*To protect the inverter, overload trip may activate in a short period of time when output current reaches 150% or higher.

Inverter overload protection characteristics

E-10

Image 62

Toshiba VF-nC1 instruction manual Using a VF motor motor for use with inverter, Inverter over load characteristics

Contents

Industrial Inverter Safety precautions Limits in purpose General operation Transportation ‚ Installation Wiring Operations When retry function is selected inverter Attach warning labels ― Contents ― 10.1 Check purchased product Contents of the product codeRead first Name and function of each part Operation keypad panel Front panel Self-up terminal block VFNC1-2001P～2007P VFNC1-2015P～2022P VFNC1S-1007P VFNC1S-2015P～2022P Control circuit terminal block Same type of terminal board is provided for all models Motors Inverters Leakage current from the inverter main unit DisposalWhat to do about leak current Effects of leakage current across ground Affects of leakage current across lines Remedies Installation Installation environment Examples of unapplicable chemicals and solvents Resistor How to install Installation location VFNC1S VFNC1 Installing more than one unit in a cabinet Connection Standard connections Control and main power supplyWiring Preventing radio noise Standard connection diagram VF-nC1 When using V1/S3 terminal as a logic input terminal H DC reactor ＊ DCL option P0 ＊4 DC reactor＊5 Main circuit terminals Power supply and motor connectionsDescription of terminals Connections with peripheral equipment Control circuit terminals sink logic common CC VI/S3 FLA Sink logic negative common/source logic positive commonOUT FLB Switching the input terminal logic between sink and source Simple operation Run / stop SettingSimple operation of the VF-nC1 Frequency RUN Motor starts Motor stops slowdown stop Short F and CC terminals run forward Setting the frequency using the operation panel Hoqf Setting the frequency using external potentiometer Setting the frequency using current input 4-20mA Setting the frequency by serial communications Hoqf Setting the frequency using input voltage Basic VF-nC1 operations How to set parameters Setup parameters How to set a setup parameter KP KV How to set the basic parameters Steps in key entry for basic parameters How to set extended parameters Steps in key entry for extended parameters CWH GPF HTH Press the Enter key to display the setting of the parameter ITW CEE Parameters that cannot be changed while running Returning all parameters to standard default setting Kpkv Frequency setting mode selection Selecting an operation modeCommand mode selection Settings Meter setting and adjustment Function FM/OUT Adjustment scale with meter adjustment HO parameterAdjusting the meter in inverter stop state Houn Standard default setting HT Forward/reverse selection Operation panel Setting acceleration/deceleration timeSelecting forward and reverse runs operation panel only CEE Acceleration time 1 s FGE Deceleration time 1 s Upper limit and lower limit frequencies Parameter settingMaximum frequency HJ Maximum frequency Hz XN Base frequency 1 Hz Selecting control modeBase frequency XD Explanation of terms Setting the electronic thermalSetting of motor electronic thermal protection level 1 VJT Setting the motor electronic thermal protection level 1 VJT Using a VF motor motor for use with inverterInverter over load characteristics Preset speed frequency setting Preset speed operation speeds in 15 stepsSetting method Run/stop Motor 150%-overload time limit H Using other speed commands with preset speed command Eoqf Extended parameters Output signal-related parametersOutput terminal setting FM/OUT terminal functions selection Parameter for specifying a frequency OFF Parameters related to terminal function selection Setting of contact input terminal function Connection method Switching between control logics Sink/Source selection Jog run Setting of output terminal functions 40MCHG Setting of switching terminalsBasic parameters OFF Analog signals for frequency setting Setting frequency command characteristics 0 voltage input Adjustment of 0~10Vdc voltage inputAdjustment of 4~20mAdc current input Starting frequency Starting frequency setting Hz Operation frequency DC braking PWM carrier frequency Preset speed operation frequencies 8 to ～ H Preset speed operation frequencies 8 to 15 Hz Jump frequency Hz Jump width Hz Trip-less intensification During restart operation, the message TVT is displayed Start of motor during coasting Motor speed search function Application to a crane or hoist Inverter, motor and machine ・GRJQ ・QEC・QEN ・GTT External connection Setting the PI control parameterPerforming PI control Types of PI control interfaces Adjusting the PI control gain level Adjusting an analog command voltage Improving torque and speed characteristics Optimizing control characteristics 2 switching frequencySwitching between acceleration and deceleration Acceleration/deceleration Current stall setting Stall prevention level Protection functions External trip stop by means of a terminal Emergency stop by means of the operation panel ①Press the Stop key Gqhh will blink Function Undervoltage trip Under voltage trip selection FM/OUT terminal selection 1 12 OT over-torque detection Operation panel parameters Setting methodsCanceling the setting Analog input disconnection detection Selection of monitor display selection Communication function common serialChanging the standard monitoring item Data transmission specifications 16.1 Using RS232C/RS485 conversion unitsSetting up the communications function Communications parameters Common serial options Free notes Free notes Setting the operation frequency Variety of operation RSS4 Setting the operation mode Monitoring the operation status Status monitor modeSetting procedure eg. operation at 60Hz Key to change items displayed in the status monitor mode Display of trip information Example of call-up of trip information ⇔ Abstract Taking measures to satisfy the CE / UL / CSACompliance with CE Marking EMC directive 89/336/EEC 【Ex. Countermeasure main circuit wiring】 Compliance with EMC directive Model, noise filter inside EMFA2015Z Models without EMI filtersEMFA2006Z EMFAS2011Z 【Operating with external signals】【Accessories for countermeasure】【Apply if needed】 Compliance with Low voltage directive Compliance with InstallationCompliance with UL Standard and CSA Standard Compliance with Connection Motor thermal protection AIC Selection of wiring materials and devices Peripheral devices Selection of wiring devices THR Magnetic contactor in the primary circuit Installation of a magnetic contactorInstallation of an overload relay Magnetic contactor in the secondary circuit 11.2 Basic parameters Table of parameters and data11.1 User parameters NN－WN UT VJTQNO NNWN LOW Extended parametersInput/output parameters Frequency parameters NN-WN Operation mode parameters Torque boost parameters Acceleration/deceleration time parameters Protection parameters Communication parameters Factory setting parameterOperation panel parameters Default settings by inverter rating Table of input terminal functions +SS3+AD2 +SS1+AD2+SS2+AD2 +SS4+AD2 Table of output terminal functions Order of precedence of combined functions Standard specifications SpecificationsModels and their standard specifications Self-cooling Forced LED External dimensions External dimensions/weightsExternal dimensions/weights FGE QER Trip causes/warnings and remediesCEE QER GRJ GRJ Oqhh CPUQHH TVT UK UvqrUQ Restoring the inverter from a trip If the motor does not run while no trip message is displayed YES How to determine the causes of other problems Check points Inspection and maintenanceRegular inspection Periodical inspection Check items Replacement of expendable parts Standard replacement cycles of principal parts Making a call for servicing Keeping the inverter in storage Warranty Disposal of the inverter 2004-10