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User's Guide
MCF8316A Tuning Guide
This Tuning guide provided step by step guidence to setup MCx8316AEVM, connect MCF8316A GUI to the
EVM and tune a 3-phase Brushless DC motor using MCF8316A.
History......................................................................................................................................................................2
2
Introduction.............................................................................................................................................................................3
Setup...................................................................................................................................................3
3 Essential Controls..................................................................................................................................................................
Configuration.............................................................................................................................................6
3.3 Control Configuration - Motor Parameters.........................................................................................................................
3.6 Fault Handling....................................................................................................................................................................
Controls.......................................................................................................................................................................12
Configuration...........................................................................................................................................12
4.2 System Level Configuration.............................................................................................................................................
4.3 Control Configurations.....................................................................................................................................................
Figure 2-1. Simplified Schematic of
Figure 2-2. MCx8316A EVM Jumper Configuration....................................................................................................................
Figure 2-3. MCx8316A EVM External Configuration...................................................................................................................
Figure 3-1. Fault Status...............................................................................................................................................................
Figure 3-2. Motor Resistance......................................................................................................................................................
Inductance.......................................................................................................................................................9
Figure 3-4. Motor BEMF
Constant.............................................................................................................................................10
Figure 4-1. Phase current and FFT - Dead time compensation disabled..................................................................................
Figure 4-4. Power Supply voltage and phase current waveform when AVS is enabled............................................................
Figure 4-5. MPET - Phase
current.............................................................................................................................................15
Figure 4-6. IPD current waveform during Rand L measurement...............................................................................................
Function...........................................................................................................................................16
SLLU335A - AUGUST 2021 - REVISED JANUARY 2022
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ABSTRACT
Table of Contents
Values...........................................................................................................................................6
Loop...................................................................................................................................7
Loop................................................................................................................7
List of Figures
MCF8316A..........................................................................................................................3
List of Tables
Values....................................................................................................................................6
Copyright © 2022 Texas Instruments Incorporated
Circuit.............................................................................11
enabled...................................................................................13
disabled............................................................14
Table of Contents
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MCF8316A Tuning Guide
1
Table of Contents
Related Manuals for Texas Instruments MC 8316AEVM Series
Summary of Contents for Texas Instruments MC 8316AEVM Series
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Page 1: Table Of Contents
Figure 4-6. IPD current waveform during Rand L measurement....................Figure 4-7. Reverse Drive Function............................16 List of Tables Table 3-1. Recommended Default Values............................6 SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 MCF8316A Tuning Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 2: Revision History
Changes from Revision * (August 2021) to Revision A (January 2022) Page • RTM updates..............................Trademarks All trademarks are the property of their respective owners. MCF8316A Tuning Guide SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 3: Introduction
Ensure the hardware is configured according to the jumper configuration as shown in Figure 2-2. Red boxes indicate where jumpers should be installed on the EVM. SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 MCF8316A Tuning Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 4: Figure 2-2. Mcx8316A Evm Jumper Configuration
Hall-effect sensors, leave these wires unconnected. Supply a voltage compliant with the Power Supply Voltage (VM) range using J7. Recommended voltage range for the device is 4.5 V – 35 V. MCF8316A Tuning Guide SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 5: Figure 2-3. Mcx8316A Evm External Configuration
MCx8316 device by clicking on the "Read All Registers" button on the top right of this GUI. After a few seconds, the GUI should indicate with a pop-up notification that all registers have been read back successfully. SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 MCF8316A Tuning Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 6: Essential Controls
Frequency input on SPEED pin by varying frequency of input signal • Analog input on SPEED pin by varying amplitude of input signal • Over I C by configuring SPEED_CTRL MCF8316A Tuning Guide SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 7: Control Configuration - Motor Parameters
Once the speed command is issued, the device will start commutating and the motor should start spinning that is proportional to the I2C Speed Command Percentage. SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 MCF8316A Tuning Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 8: Figure 3-1. Fault Status
Save the register settings by clicking File->Save Registers in the GUI. If there were no faults, skip to Section Figure 3-1. Fault Status MCF8316A Tuning Guide SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 9: Fault Handling
This fault gets triggered when motor stalls while running in open loop for BEMF estimation. If this fault is triggered, then please follow the below suggestions. SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 MCF8316A Tuning Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... - Page 10 3.6.4 Lock Current Limit [LOCK_LIMIT] This fault gets triggered when the motor is loaded above the stall torque of the motor. MCF8316A Tuning Guide SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...
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Page 11: Figure 3-5. Phase Current Waveform Showing A Spike Due To Short
Step 1: Make sure the motor phases are connected to J5 or TP9, TP10, or TP11. Step 2: If the fault persists, set the No-Motor lock current threshold [NO_MTR_THR] to 0.05A. SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 MCF8316A Tuning Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 12: Basic Controls
This mode is useful in applications that require motor speed information above a certain speed, and rotor motion information during the coast and braking conditions. MCF8316A Tuning Guide SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 13: Figure 4-1. Phase Current And Fft - Dead Time Compensation Disabled
Enable Bus current limit [BUS_CURRENT_LIMIT_ENABLE] and configure the Bus current limit [BUS_CURRENT_LIMIT] to protect the power supply from drawing higher current. SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 MCF8316A Tuning Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 14: Control Configurations
Offline measurement of parameters takes place before normal motor operation. Variation in motor parameters can impact the accuracy of motor MCF8316A Tuning Guide SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 15: Constant
Motors with higher inertia coast for a longer period of time. It is recommended to have ISD enabled in applications that require frequent motor starts and stops and use higher inertia motors. SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 MCF8316A Tuning Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 16: Figure 4-7. Reverse Drive Function
Step 5: Enter the Kp coefficient [ACTIVE_BRAKE_KP] and Ki coefficient [ACTIVE_BRAKE_KI] for Active braking loop. We recommend to start with Kp coefficient [ACTIVE_BRAKE_KP] as 700 and Ki coefficient [ACTIVE_BRAKE_KI] as 100. MCF8316A Tuning Guide SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... - Page 17 Step 1: Select Slow first cycle in the Motor startup option [MTR_STARTUP] in “Control Configuration – Motor Startup Stationary” tab in the GUI. SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 MCF8316A Tuning Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...
- Page 18 Step 8: Keep increasing ramp rate for reducing difference between estimated theta and open loop theta to 2 deg/ms. Step 9: Increase Closed loop acceleration rate [CL_ACC] MCF8316A Tuning Guide SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...
- Page 19 Stp 7: Adjust the Iq reference [FORCE_IQ_REF_SPEED_LOOP_DIS] such that the motor speed reaches the maximum speed. Step 8: Speed loop Kp [SPD_LOOP_KP] is calculated using Equation SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 MCF8316A Tuning Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...
- Page 20 [AUTO_RETRY_TIMES] after every [LCK_RETRY] seconds. This can be configured in LOCK_ILIMIT_MODE. We have defaulted the auto retry time and lock retry. MCF8316A Tuning Guide SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...
- Page 21 Step 5: MCF8316A uses a PI controller to generate the D-axis reference current. Manually tune ACTIVE_BRAKE_KP and ACTIVE_BRAKE_KI if the active brake current looks unstable. SLLU335A – AUGUST 2021 – REVISED JANUARY 2022 MCF8316A Tuning Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...
- Page 22 STANDARD TERMS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms set forth herein.
- Page 23 www.ti.com Regulatory Notices: 3.1 United States 3.1.1 Notice applicable to EVMs not FCC-Approved: FCC NOTICE: This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit to determine whether to incorporate such items in a finished product and software developers to write software applications for use with the end product.
- Page 24 www.ti.com Concernant les EVMs avec antennes détachables Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à...
- Page 25 www.ti.com EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS. 4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling or using the EVM, including without limitation any warning or restriction notices.
- Page 26 Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2019, Texas Instruments Incorporated...
- Page 27 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. TI objects to and rejects any additional or different terms you may have proposed. IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2022, Texas Instruments Incorporated...